Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

TRAIN-WAY > RL CHEM 2 > Flashcards

RL CHEM 2 Flashcards

1
Q

●Rutherford bombarded _____ particles in discoveryof nucleus.—

A

Alpha Rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

●Atomic orbits having same energy are called: —

A

Degenerate orbitals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

●When electrons collide with heavy metals than ____are produced.—

A

X-Rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

●Atom with higher atomic number produces X-raysof: —

A

shorter wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

●The atomic number of an element having maximumnumber of unpaired electrons in p-subshell is:—

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

●When an atom absorbs energy the lines in thespectrum will appear which are:—

A

Darker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

●Colour of fluorescene produced by cathode raysdepends upon:—

A

composition of glass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

●Positive rays are produced: —

A

By the bombardmentof cathode rays on gas molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

●Geometry of simple molecule having sp3 hybridorbital is: —

A

Tetrahedral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

●Space around nucleus where finding probability ofelectrons is maximum is called:—

A

orbital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

●Geometry of molecule will be pyramidal if the outerpost shell of the central atom has: —

A

3 bond pairone lone pair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

●According to VESPR Model the geometry of moleculehaving 5 bond pair in outer most shell will be:—

A

Trigonal bi-pyramidal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

●Molecular orbital which have higher energy thanatomic orbitals is called:—

A

Anti-bondingmolecular orbital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

●Unpaired electron in a molecule gives _____character. —

A

Paramagnetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

●Unit of dipole moment is:—

A

Debye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

●Which of the following can expel proteons fromparaffins? —

A

Neutron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

●Centrifugal forces are balanced in atom by:—

A

attractive forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

●Spectrum is produced due to:—

A

different wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

●Splitting of spectral lines when atoms are subjected tostrong electric filed is called:—

A

Stark effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

●The rate of reaction:—

A

Decreases as the reactionproceeds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

●The addition of a catalyst to the reaction system: —

A

Increases the rate of forward as well as backwardreaction equally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

●The specific rate constant of a first order reactiondepends on the:—

A

Temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

●On increasing the temperature the rate of reactionincreases mainly because:—

A

Collision frequencyincreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

●The value of activation energy is primarilydetermined by: —

A

Effective collision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

●Sum of exponents of molar concentration is called: —

A

Order of reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

●Unit of rate of reaction is:—

A

Moles dm-3 sec-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

●Rate of reaction when concentration of reactants aretaken as unity is called:—

A

Specific rate constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

●Radiations are absorbed in: —

A

Spectrophotometermethod

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

●Energy of reactant higher than energy of productfavours: —

A

Exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

●Neutralization reactions and Ionic reactions havevery high rate of reaction because of: —

A

Doubledecomposition reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

●The substances that reduces the effectiveness of acatalyst are called:—

A

Poisoning catalysts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

●An enzyme has its specificity due to:—

A

structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

●A substance which increases the reactivity of enzymeis called: —

A

promoters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

●When the reaction completes in more than one stepsrate of reaction will be determined by:—

A

sloweststep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

●Energy of activation for backward reaction is lessthan forward reaction for ________ reaction.—

A

Endothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

●When NaCl is dissolved in water the sodium ionbecomes: —

A

hydrated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

●The oxidation number of nitrogen in NO3- is:—

A

+5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

●To prevent rancidification of food material, what isadded? —

A

Anti-oxidant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

●Which of these substances is a good reducing agent?—

A

KBr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

●When H2S reacts with halogens, the halogens are:—

A

reduced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

●What is used as an oxidant, a reductant and an acid?—

A

H2O2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

●Strongest reducing agent is:—

A

K

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

●Several blocks of magnesium are fixed to the bottomof a ship to:—

A

Prevent action of water and salt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

●Prevention of corrosion of iron by zinc coating iscalled: —

A

Galvanization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

●The oxidation number of C in CO2 is:—

A

+4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

●In the course of a chemical reaction an oxidant: —

A

gains electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

●What happens when a sulphur atom becomes asulphide ion? —

A

It gains 2 electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

●The atomic number of an element which shows theoxidation state of + 3 is:—

A

13

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

●An example for a strong electrolyte is:—

A

Sodiumacetate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

●Theory of ionization was given by:—

A

Arrhenius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

●An example of a Lewis acid is:—

A

AlCl3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

●Ammonium hydroxide is a:—

A

Weak electrolyte

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

●Ionization depends upon:—

A

dilution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

●The colour of an electrolyte solution depends on: —

A

The nature of both the ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

●The suitable indicator for strong acid and weak baseis: —

A

Methyl Orange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

●The best conductor of electricity is a 1.0 M solutionof: —

A

Sulphuric acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

●In weak electrolytic solution, degree of ionization: —

A

Will be proportional to the square root of dilution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

●A solution of FeCl3 in water acts as acidic due to: —

A

Hydrolysis of Fe3+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

●According to which law, the degree of ionization isdirectly proportional to the dilution?—

A

Ostwald’sdilution law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

●Enthalpy of combustion for food fuel and othercompounds can be measured accurately by:—

A

Bom calorimeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

●The strength of an acid depends on its tendency to: —

A

Donate protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

●Which of the following is non-electrolyte? —

A

C12H22O11

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

●NaOH is a strong base because:—

A

It gives OH- ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

●The pH indicators are: —

A

Either weak acids or weakbases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

●An ionizing solvent has: —

A

High value of dielectricconstant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

●The colour of an electrolyte solution depends on: —

A

The nature of both the ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

●If internal energy of the system is increased: —

A

Change in state of the system is increased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

●____ is the study about energy of a chemical system.—

A

Thermochemistry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

●The environment in which a system is studied is:—

A

surrounding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

●Anything which depends upon initial and final stateof a system is:—

A

state function

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

●At infinite dilution, the percentage ionization for bothstrong and weak electrolytes is:—

A

100%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

●Reaction in which heat evolves is called:—

A

Exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

●When enthalpy of reactants is higher than productthen reaction will be:—

A

Exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

●Octane number can be improved by:—

A

isomerization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

●Alkanes containing a methyl group on main chain at2nd carbon are called:—

A

iso-alkane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

When one hydrogen atom of alkane is removed then itis called: —

A

alkyl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

●The rectified spirit contains:—

A

95% alcohol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

●The basis on the mode of their formation, thepolymers can be classified:—

A

Both as addition andcondensation polymers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

●The irritation caused by red ants bite is due to:—

A

Formic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

●Which alcohol will undergo elimination reaction togive alkene in the presence of acidic potassiumdichromate? —

A

Tertiary alcohol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

●Alkanes are also known as:—

A

Paraffins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

●When - COOH is attached directly to the benzenering the acid is called:—

A

aromatic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
83
Q

●The common name of propane 1 3-dioic is:—

A

Malonicacid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
84
Q

●Sabatier Senderns reaction involve _________ inpresence of Ni.—

A

Aalkene & H2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
85
Q

●Which C-X bond has the highest bond energy permole? —

A

C-F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
86
Q

●Which compound is also known by the name ofcarbolic acid? —

A

C6H5OH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
87
Q

●Hydrogenolysis results in the formation of:—

A

alkane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
88
Q

●Which alkyl halide has the highest reactivity for aparticular alkyl group?—

A

R-I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
89
Q

●Ethyl chloride with nascent hydrogen produces:—

A

Ethane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
90
Q

●Heating phenol with Zn will yield:—

A

Benzene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
91
Q

●Which acid is used in the manufacture of syntheticrubber? —

A

Acetic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
92
Q

●The acid which is used as ink remover is:—

A

Oxalicacid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
93
Q

●Clemmensens reduction infolves the reduction of:—

A

Ketone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
94
Q

●The common thing in phthalic acid and oxalic acid isthat both are:—

A

Dicarboxylic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
95
Q

●The number of molecules taking part in the ratedetermining step is called:—

A

Order of reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
96
Q

●Glyptals are chiefly employed in:—

A

Surface coating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
97
Q

●Acidic amino acids have: —

A

2 carboxylic groups and1 amino group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
98
Q

●Removal of CO2 is called:—

A

decarboxylation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
99
Q

●Ethanol can be converted into ethanoic acid by:—

A

Oxidation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
100
Q

●The term internal salt refers to: —

A

Dipolar characterof amino acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
101
Q

●Which alkyl halide out of the following may followboth SN1 and SN2 mechanism?—

A

(CH3)2 CH - X

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
102
Q

●Natural rubber is which type of polymer?—

A

Additionpolymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
103
Q

●Soda lime is a mixture of:—

A

CaO and NaOH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
104
Q

●Methyl alcohol is not used:—

A

As a substitute forpetrol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
105
Q

●When two moles of ethyl chloride react with twomoles of sodium in the presence of ether what willbe formed?—

A

1 mole of butane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
106
Q

●The ether used in Wurtz synthesis is:—

A

dry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
107
Q

●Dehalogenation of ethyl tetrahalide will give:—

A

Ethyne

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
108
Q

●The organic acid that does not has COOH group is:—

A

Carbolic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
109
Q

●When CO2 is made to react with ethyl magnesiumiodide followed by acid hydrolysis the productformed is:—

A

propanoic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
110
Q

●R-Mg-Br is called:—

A

Grignard reagent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
111
Q

●Upto ___ C atoms alkanes are gases.—

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
112
Q

●Grignard reagent is reactive due to:—

A

the polarity ofC-Mg bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
113
Q

●Teflon is a polymer of the monomer or Teflon isobtained by the polymerisation of:—

A

Tetrafluoroethene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
114
Q

●Methanol can be obtained from:—

A

water gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
115
Q

●The test which is used for the identification of amino-acids is:—

A

Ninhydrin test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
116
Q

●The starting material for the preparation of styreneis: —

A

Ethyne

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
117
Q

●Nylon is not a:—

A

Homopolymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
118
Q

●Polythene is:—

A

Thermoplastic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
119
Q

●Nylon threads are made of:—

A

Polyamide polymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
120
Q

●An alcohol which can be prepared by fermentation is:—

A

CH3 - CH2 - OH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
121
Q

●Incomplete oxidation of methane in the limitedsupply of air forms leads to:—

A

CH3OH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
122
Q

●The molecular weight of cellulose varies between: —

A

20000 to 500000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
123
Q

●Orlon is a polymer of:—

A

Acrylonitrile

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
124
Q

●Absolute alcohol is obtained when rectified spirit istreated with:—

A

CaO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
125
Q

●Carboxylic acid reacts with ammonia to formammonium salts which on heating produces:—

A

Acidamide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
126
Q

●Celluloid is:—

A

A thermoplastic material obtainedfrom cellulose nitrate and camphor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
127
Q

●Introduction of nitro group in a molecule is called:—

A

Nitration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
128
Q

●Polymerization of glycol with dicarboxylic acids is: —

A

Condensation polymerization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
129
Q

●Nylon-66 is a:—

A

Condensation polymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
130
Q

●The complete reduction of carboxylic acid results inthe formation of:—

A

alkane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
131
Q

●Which polymer is formed by chloroethene?—

A

PVC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
132
Q

●Triethyl aluminium titanium chloride used in plasticindustry is a:—

A

Ziegler-Natta catalyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
133
Q

●Bakelites are:—

A

Resins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
134
Q

●When alcohol reacts with phosphorous halides itgives: —

A

Alkyl Halides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
135
Q

●Order of ease of halogenation in alkane is:—

A

F2>Cl2>Br2>I2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
136
Q

●Among the following a natural polymer is:—

A

Cellulose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
137
Q

●Polymer used in bullet proof glass is:—

A

PMMA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
138
Q

●Nylon polymers are:—

A

Amphoteric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
139
Q

●Phenol was isolated by Runge from:—

A

Coal tar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
140
Q

●The organic acid that can be made from ethanol is:—

A

Acetic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
141
Q

●The gas used in manufacturing of urea fertilizer is: —

A

CH4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
142
Q

●The Zieglar-Natta catalysts are:—

A

Stereospecific

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
143
Q

●Melamine is a:—

A

White crystalline solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
144
Q

●Terylene is used for making: —

A

Silk, Seat belts andfabrics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
145
Q

●Formalin is _______ % solution of formaldehyde inwater. —

A

52%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
146
Q

●The formula of palmitic acid is:—

A

C15H31COOH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
147
Q

●Glyptal is a:—

A

Alkyd resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
148
Q

●Ethers show functional group isomerism with:—

A

alcohol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
149
Q

●Removal of halogen and hydrogen atom is: —

A

dehydrohalogenation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
150
Q

●Formalin is _______ % solution of formaldehyde inwater. —

A

40%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
151
Q

●The aliphatic monocarboxylic acids are obtained bythe hydrolysis of:—

A

fats and oils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
152
Q

●Which one of the following is a linear polymer?—

A

Amylose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
153
Q

●Polymer formation from monomers starts by: —

A

Coordinate reaction between monomers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
154
Q

●Monomers are converted to polymer by: —

A

Condensation reaction between monomers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
155
Q

●The catalyst used in the manufacture of polyetheneby Ziegler method is:—

A

Titanium tetrachlorideand trimethyl aluminium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
156
Q

●Alkenes are produced from dehalogenation of: —

A

vicinal dihalo alkane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
157
Q

●Caprolactam is the monomer of:—

A

Nyon-6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
158
Q

●The process of fermentation of starch involve manyenzymes the sequence of enzymes used are:—

A

Diastase-maltase-zymase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
159
Q

●The basic hydrolysis of ethyl acetate produces: —

A

Ethanol and sodium acetate

160
Q

●’Starch’ consists of two fractions; one is á-amyloseand the other is:—

A

Amylopectin

161
Q

●In the natural rubber ‘Caoutchouc’ the isopreneunits are joined by:—

A

Head-to-tail

162
Q

●What catalyst is employed when benzene is preparedfrom acetylene at 700 C?—

A

Organo-nickel

163
Q

●Carboxylic acid on reduction with HI / phosphorousyields: —

A

alkane

164
Q

●In benzene sulphonic acid the sulphonic group isattached with benzene ring through:—

A

Sulphur

165
Q

●The residue obtained after the crystallization of sugarfrom concentrated sugar cane juice is called:—

A

molasses

166
Q

●How many moles of H2 are added up when benzene isheated with hydrogen in the presence ofplatinum?—

A

3

167
Q

●The reaction of carboxylic acids with alcohols inpresence of concentrated H2SO4 is called:—

A

esterification

168
Q

●The amino acid present in cheese is:—

A

Tyrosine

169
Q

●By which method the molecular mass of benzene wasdetermined as 78.108?—

A

Vapour density method

170
Q

●Water gas heated at 4500 C and 200 atm pressure inthe presence of ZnO+Cr2O3 will produce:—

A

methanol

171
Q

●Preparation of vegetable ghee involves:—

A

hydrogenation

172
Q

●Michael Faraday discovered benzene in the gas whichwas produced by destructive distillation ofvegetable oil that is done in:—

A

The absence ofOxygen

173
Q

●Hydro carbons which burn with smoky flame arecalled: —

A

aromatic

174
Q

●Octane number 2 2 4-trimethyl pentane is:—

A

100

175
Q

●Geometric isomerism is usually found in:—

A

alkenes

176
Q

●Pentane and 2-methyl butane have the same: —

A

Percentage composition

177
Q

●Organic compounds that are essentially non-polarand exhibit weak intermolecular forces have:—

A

Low melting points

178
Q

●The first organic compound was synthesized inlaboratory by:—

A

Wohler

179
Q

●First organic compound synthesized in laboratorywas: —

A

Urea

180
Q

●The property of carbon chain formation is called:—

A

Catenation

181
Q

●Chemical properties of first member of homologousseries with respect to other members are:—

A

same

182
Q

●The organic compounds having very high molecularweight are called:—

A

Polymers

183
Q

●Compounds having same molecular formula butdifferent in structural formula are called:—

A

Isomer

184
Q

●Organic compounds are soluble in:—

A

Non-polarsolvent

185
Q

●Methane is used in power generation in chemicalindustries being a:—

A

cheaper

186
Q

●Crude oil is blackish coloured liquid produced afterthe decay of organic matter present between:—

A

Sedimentary Rocks

187
Q

●Which one of the following compounds shows intenseknocking?—

A

n-Heptane

188
Q

●What can be used as anti-knocking agent?—

A

(C2H5)4Pb

189
Q

●Ether functional group can be represented as:—

A

R-O-R

190
Q

●Isomerism which is present only in alkene is: —

A

cis-trans isomerism

191
Q

●A single atom or group of atoms which givescharacteristic properties to a compound is called:—

A

Functional Group

192
Q

●Which is a Compound containing benzene ring in itsstructure?—

A

Aromatic compound

193
Q

●Which type of isomerism is shown by 2-propanol and1-propanol?—

A

position isomerism

194
Q

●In sp3 hybridization the expected geometry ofmolecules will be:—

A

Tetrahedral

195
Q

●Only sigma bonds are present in:—

A

ethoxy ethane

196
Q

●In cyano group the carbon atom shows which kind ofhybridization?—

A

sp

197
Q

●The structure of ethyne is:—

A

linear

198
Q

●The fractional distillation of petroleum producesgasoline up to:—

A

20%

199
Q

●The general formula of cycloalkene is:—

A

CnH2n-2

200
Q

●Which is not heterocyclic compound?—

A

Aniline

201
Q

●What is the number of isomers in C5H12?—

A

Three

202
Q

●Elements in the same vertical group of the periodictable have same:—

A

Number of valence electrons

203
Q

●Plaster of Paris hardens by:—

A

Uniting with water

204
Q

●The most electropositive amongst the alkaline earthmetals is: —

A

Barium

205
Q

●Hydrogen does not combine with:—

A

Helium

206
Q

●Paramagnetism is exhibited by molecules: —

A

Carrying unpaired electrons

207
Q

●Transitional elements exhibit variable valenciesbecause they release electrons from which of thefollowing orbits? —

A

(n - 1) d and ns orbits

208
Q

●Stainless steel is an alloy of: —

A

Nickel and chromium

209
Q

●The property of the alkaline earth metals thatincreases with their atomic number is:—

A

Solubility of their hydroxides

210
Q

●In electrolysis of aluminium oxide which of thefollowing is added to accelerate the process?—

A

Cryolite

211
Q

●As compared to lithium, sodium reacts quickly withwater because:—

A

it is

212
Q

●In the first transition series, the highest boiling pointand melting point is of:—

A

Cr

213
Q

●The H - O - H angle in water molecule is about:—

A

105°

214
Q

●Lanthanoids are: —

A

14 elements in the sixth period(atomic no. = 58 to 71) that are filling 4f sublevel

215
Q

●Temporary hardness of water is due to the presenceof: —

A

Magnesium bicarbonate

216
Q

●The composition of tritium is: —

A

1 electron, 1 proton,2 neutrons

217
Q

●An element having low value of ionization energy andlow value of electron affinity is likely to belong to:—

A

Group IA

218
Q

●Sodium thiosulphate is used in photography:—

A

Toconvert metallic silver into silver salt

219
Q

●One of the important use of ferrous sulphate is in the:—

A

Manufacture of blue black ink

220
Q

●Among halogens the highest boiling point is of:—

A

Iodine

221
Q

●Hydrogen acts as a reducing agent and thusresembles:—

A

alkali metals

222
Q

●Of the metals Be, Mg, Ca and Sr of group II A. In theperiodic table the least ionic chloride would beformed by:—

A

Be

223
Q

●Tritium undergoes radioactive decay giving:—

A

â-particles

224
Q

●Hydrogen cannot reduce:—

A

Hot Al2O3

225
Q

●The purification of alumina is called :—

A

Baeyer’sprocess

226
Q

●The reagent commonly used to determine hardness ofwater titrimetrically is:—

A

Disodium salt of EDTA

227
Q

●The elements of group IA provide a colour to theflame of Bunsen burner due to:—

A

Low ionizationpotential

228
Q

●When washing soda is heated: —

A

Water vapour isreleased

229
Q

●The most dangerous method of preparing hydrogenwould be by the action of HCl and:—

A

K

230
Q

●Valency electrons in alkali metals are:—

A

1

231
Q

●Transition metals are often paramagnetic owing to:—

A

The presence of one or more unpaired electronsin the system

232
Q

●Zinc and mercury do not show variable valency liked-block elements because:—

A

Their d- shells arecomplete

233
Q

●In first transition series, the melting point of Mn islow because:—

A

of weak metallic bonds

234
Q

●The tendency towards complex formation ismaximum in: —

A

d - block elements

235
Q

●Elements which generally exhibit multiple oxidationstates and whose ions are usually coloured are: —

A

Transition elements

236
Q

●Periodic table provides a basic framework to studyelements with respect to their: —

A

Physicalproperties, chemical properties and properties oftheir compounds

237
Q

●Concept of Triads was introduced by:—

A

Dobereiner

238
Q

●In modern periodic table all the elements arearranged in ascending order of:—

A

atomic number

239
Q

●The longest period in the modern periodic table is: —

A

6th period

240
Q

●Variable valency is shown by:—

A

Transition elements

241
Q

●Seventh period contains _____ normal elements.—

A

2

242
Q

●Modern periodic table has been divided in how manyblocks? —

A

4 blocks

243
Q

●Non-metals usually form:—

A

acidic oxides

244
Q

●Amphoteric oxides are those which possess ___properties.—

A

acidic and basic

245
Q

●Hydrogen resembles with carbon because of havingremarkable:—

A

reducing properties

246
Q

●Heavy water is used in atomic reactor as:—

A

Bothmoderator and coolant

247
Q

●The atomic radii decreases by increasing atomicnumber in: —

A

Elements from Li to Ne

248
Q

●Which discovery caused a revision in the periodic lawas stated by Mendeleev?—

A

Atomic number byMoseley

249
Q

●An element has electronic configuration 1s2 2s2 2p2.It belongs to:—

A

Group IV-A

250
Q

●The property which increases up to group IV-A thendecreases onwards:—

A

Melting & boiling points

251
Q

●The transitional metal which form green compoundin +3 oxidation state and yellow orange compoundin +6 oxidation state is:—

A

Cr

252
Q

●The atoms of same element having same atomicnumber but different mass number are called:—

A

Isotopes

253
Q

●Deuterium reacts with oxygen to form:—

A

Heavywater

254
Q

●Ionization energy depends upon:—

A

I.E depends uponall of the above and nature of orbital

255
Q

●Shielding effect across the period:—

A

Remainsconstant

256
Q

●The ionic compound BaSO4 is insoluble in water dueto: —

A

High lattice energy

257
Q

●Beryllium differs from rest of the members of itsfamily (Group-IIA) in many ways. The reason forthis is its: —

A

Small size and higherelectronegativity

258
Q

●Based on lattice energy and other considerationswhich one of the following alkali metal chlorides isexpected to have the highest melting point?—

A

NaCl

259
Q

●The hardest substance amongst the following is:—

A

B4C

260
Q

●Which of the following gives propyne on hydrolysis?—

A

Magnesium carbide (Mg2C3)

261
Q

●When two ice cubes are pressed over each other, theyunite to form one cube. Which force is responsibleto hold them together?—

A

Hydrogen bondformation

262
Q

●In a reaction the ferrous Fe++ iron is oxidised toferric Fe+++ ion. The equivalent weight of the ionin the above reaction is equal to:—

A

the atomicweight

263
Q

●Mercury is the only metal which is liquid at 0° C Thisis due to its:—

A

Very high ionisation energy andweak metallic bond

264
Q

●Addition of 2nd electron to a un-negative ion isalways:—

A

Endothermic

265
Q

●Higher value of electron affinity means: —

A

Atom willgain electron easily

266
Q

●Metallic characters of alkali metals: —

A

Increasedown the group

267
Q

●Pure hydrogen is obtained by carrying electrolysis of:—

A

Ba(OH)2 solution

268
Q

●Mercury is transported in metal containers made of:—

A

Iron

269
Q

●The liquid field metal expanding on solidification is:—

A

Ga

270
Q

●When electric current is passed through an ionichydride in the molten state?—

A

Hydrogen isliberated at the anode

271
Q

●Melting points of VII-A group elements down thegroup: —

A

Increase

272
Q

●Oxidation state of an atom represents: —

A

Apparentcharge in compound

273
Q

●Halides in which halogen atoms act as a bridgebetween two atoms of the other element arecalled: —

A

Polymeric halides

274
Q

●Pure water can be obtained from sea water by: —

A

Reverse osmosis

275
Q

●Ordinary hydrogen at room temperature is a mixtureof: —

A

75% of o-Hydrogen + 25% of p-Hydrogen

276
Q

●The halogen having highest electron affinity is:—

A

Chlorine

277
Q

●Less electronegative elements such as Be Ga A etcform: —

A

Polymeric halide

278
Q

●Iodine is solid due to:—

A

High polarizability

279
Q

●The metal ion which does not form colouredcompound is: —

A

Zinc

280
Q

●The permanent hardness of water can be removed, byadding: —

A

Washing soda

281
Q

●Stainless steel does not rust because: —

A

Chromiumforms an oxide layer and protects iron fromrusting

282
Q

●Heavy water freezes at:—

A

3.8°C

283
Q

●Triatomic hydrogen is called:—

A

Hyzone

284
Q

●Hydrogen combines with other elements by: —

A

Losing, gaining or sharing electron

285
Q

●True increasing order of acidity of the oxides of Mnis: —

A

MnO < MnO2 < Mn2O7

286
Q

●Among the halogens the rare element is:—

A

Astatine

287
Q

●Electrolysis of fused sodium hydride liberatehydrogen at the: —

A

Anode

288
Q

●Bromine can be liberated from KBr solution by theaction of: —

A

Chlorine

289
Q

●The colour of chlorine gas is:—

A

greenish yellow

290
Q

●The most powerful oxidizing agent among thehalogens is: —

A

F2

291
Q

●Hydrogen burns in air with a:—

A

Light bluish flame

292
Q

●Heavy water D2O is: —

A

Water obtained by repeateddistillation and condensation

293
Q

●Bleaching powder is an example of:—

A

Mixed salt

294
Q

●Triple point of water is:—

A

273 K

295
Q

●Deuterium differs from hydrogen in:—

A

Physicalproperties

296
Q

The velocity of neutrons in nuclear reactor is sloweddown by: —

A

Heavy water D2O

297
Q

●Hydrogen can be fused to form helium at: —

A

Hightemperature and high pressure

298
Q

●The halogen which reacts spontaneously with gold(Au) to form Au+3 is:—

A

Cl2

299
Q

●The halogen which reacts very slowly with halogen is:—

A

Iodine

300
Q

●Substance which is found in dried up lakes of Tibetand California is:—

A

Tincal

301
Q

●Bleaching powder is not used for bleaching:—

A

costlyfabrics

302
Q

●Borax is a white crystalline solid and it is: —

A

moresoluble in hot water

303
Q

●Which pair does not show hydrogen isotopes? —

A

Ortho hydrogen and para hydrogen

304
Q

●Photographic plates are coated with a thin film of:—

A

AgBr

305
Q

●Special features of borate glass is that it is: —

A

heatresistant

306
Q

●Cassiterite is concentrated by:—

A

Electromagneticseparation

307
Q

●A substance which reacts with gangue to form fusiblematerial is called:—

A

Flux

308
Q

●In blast furnace iron oxide is reduced by:—

A

CO

309
Q

●Main ore of aluminium is:—

A

Bauxite

310
Q

●The metal which is used in thermite process becauseof its activity is:—

A

aluminium

311
Q

●Purpose of smelting of an ore is:—

A

To reduce it

312
Q

●Compounds of nitrogen and phosphorus are mostly:—

A

covalent

313
Q

●The most electronegative element among thefollowing is: —

A

N

314
Q

●SO3 is not absorbed in water directly because: —

A

Reaction is exothermic

315
Q

●Phosphine gas will be produced if phosphorous acid issubjected to:—

A

Reduction and Decomposition

316
Q

●Metallurgy is the process of: —

A

Extracting the metalfrom the ore

317
Q

●Froth floatation process for the concentration of oresis an illustration of the practical application of:—

A

Adsorption

318
Q

●Azo-dyes are prepared from:—

A

Aniline

319
Q

●C3H9N1 represents:—

A

Amine

320
Q

●Aluminium oxide is:—

A

Amphoteric oxide

321
Q

●Which electronic configuration corresponds to anelement of group IIIA?—

A

1s2 2s2 2p6 3s2 3p1

322
Q

●Tincal is a mineral of:—

A

B

323
Q

●Phosphorus is a Greek word and it means:—

A

Lightbearing

324
Q

●Aniline is usually purified by:—

A

Steam distillation

325
Q

●Allotropic form of phosphorus that is poisonous is:—

A

White

326
Q

●In network of silica (SiO2) each silicon atom issurrounded by _____ atoms of oxygen.—

A

4

327
Q

●The process of aluminium extraction is called:—

A

Hallprocess

328
Q

●KCN reacts readily to give a cyanide with:—

A

Ethylbromide

329
Q

●The Hinsberg’s method is used for: —

A

Separation ofamine mixtures

330
Q

●When aniline is treated with sodium nitrite andhydrochloric acid at 0 degree C, it gives:—

A

Diazonium salt

331
Q

●Acetic anhydride can be obtained by treating ethylalcohol with:—

A

P2O5 and H2SO4

332
Q

●Phosphorous acid upon thermal decomposition yieldsphosphoric acid and:—

A

Phosphine

333
Q

●The element of group VIA which is a non-metal is:—

A

S

334
Q

●Phosphoric acid is a weak acid and its basicity is:—

A

3

335
Q

●All the elements in group VIA are ____ in nature.—

A

Polymeric

336
Q

●Which allotropic form of phosphorous is the moststable?—

A

Black

337
Q

●Boron is non metal while other elements of IIIAgroup are metals. This is because: —

A

it formsmolecular addition compounds; and it has smallsize

338
Q

●The chemical composition of cinnabar is:—

A

HgS

339
Q

●Oxygen and sulphur resemble in all except:—

A

Showsame oxidation state

340
Q

●Oxygen does not react with all except:—

A

Metals

341
Q

●CO2 is gas while SiO2 is solid at room temperature.Why? —

A

CO2 is an independent molecule whileSiO2 has network covalent structure

342
Q

●Arsenic oxides are removed by passing through: —

A

Ferric hydroxide

343
Q

●In which compound nitrogen has maximum oxidationstate? —

A

HNO3

344
Q

●When sulphuric acid is treated with ethanol sulphuricacid behaves like:—

A

a dehydrating agent

345
Q

●The coloured glassy mass in borax bead test is due tothe formation of:—

A

metal meta borate

346
Q

●Boron is non-metal whereas A1 is metal. It is due to:—

A

small size and high nuclear charge

347
Q

●Boron in soil has been considered micronutrient for:—

A

proper growth of plants

348
Q

●Boric acid cannot be used:—

A

in soda bottles

349
Q

●In photography sodium thiosulphate is used as: —

A

complexing agent

350
Q

●Lanthanides and actinides resemble in:—

A

oxidationstate

351
Q

●Requirement of macronutrient per acre of the land is:—

A

5 to 200 kg

352
Q

●Three elements needed for the healthy growth ofplants are: —

A

NPK

353
Q

●Hypochlorous acid is used for disinfecting the waterit reacts with the dissolved ammonia producing:—

A

NH2Cl, NHCl2, NCl2

354
Q

●The yellow colour in photochemical smog is due topresence of:—

A

Nitrogen dioxide

355
Q

●Incineration of municipal waste is carried out in thetemperature range of:—

A

9000-10000 C

356
Q

●Which gas is the main cause of acid rain?—

A

NO2

357
Q

●In the purification of portable water the coagulantused is:—

A

Alum

358
Q

●Newspaper can be recycled again and again howmany times?—

A

5 times

359
Q

●The main pollutant of leather tanneries in the wastewater is:—

A

Chromium IV

360
Q

●A single chlorine free radical can destroy how manyozone molecules?—

A

100000

361
Q

●Which substance can be used for disinfecting water?—

A

KMnO4

362
Q

●Chlorination of water may be harmful if the watercontains:—

A

Ammonia

363
Q

●The percentage of suspended solid waste in raw wateris removed by coagulation is:—

A

80

364
Q

●Ozone hole is substantial depletion of ozone in everyyear during:—

A

September-November

365
Q

●The main product of bacterial action is:—

A

NO

366
Q

●Pollutants have adverse effect over:—

A

Ecosystem

367
Q

●The nucleus of an atom consists of:—

A

Protons andNeutrons

368
Q

●The most electronegative element among thefollowing is:—

A

Fluorine

369
Q

●The metal used to recover copper from a solution ofcopper sulphate is:—

A

Fe

370
Q

●The number of d-electrons in Fe2+ (Z = 26) is notequal to that of:—

A

p-electrons in CI (Z = 17)

371
Q

●The metallurgical process in which a metal isobtained in a fused state is called:—

A

Smelting

372
Q

●The law which states that the amount of gas dissolvedin a liquid is proportional to its partial pressure is:—

A

Henry’s Law

373
Q

●The main buffer system of the human blood is:—

A

H2CO3 - HCO3

374
Q

●The gas present in the stratosphere which filters outsome of the sun’s ultraviolet light and provides aneffective shield against radiation damage to livingthings is:—

A

Ozone

375
Q

●The most commonly used bleaching agent is:—

A

Chlorine

376
Q

●The nucleus of a hydrogen atom consists of:—

A

1proton only

377
Q

●The heat required to raise the temperature of body by1 K is called:—

A

Thermal capacity

378
Q

●The nuclear particles which are assumed to hold thenucleons together are:—

A

Mesons

379
Q

●The mass of P4O10 that will be obtained from thereaction of 1.33 gram of P4 and 5.07 of oxygen is:—

A

3.05 gram

380
Q

●The octane number of zero is assigned to:—

A

n-Heptane

381
Q

●The metal that is used as a catalyst in thehydrogenation of oils is:—

A

Ni

382
Q

●The most abundant rare gas in the atmosphere is:—

A

Ar

383
Q

●The Latin word ‘formica’ means ant. The nameformic acid is derived from this Latin wordbecause: —

A

this acid was first obtained by thedistillation of ants

384
Q

●The ore which is found in abundance in India is:—

A

Monazite

385
Q

●The heat energy produced when the human bodymetabolizes 1 gram of fat is:—

A

39 KJ

386
Q

●What are the number of moles of CO2 which contains16 g of oxygen?—

A

0.5 mole

387
Q

●The main use of salt in the diet is to: —

A

produce insmall amounts the hydrochloric acid required forthe digestion of food

388
Q

●The luster of a metal is due to: —

A

presence of freeelectrons

389
Q

●The number of water molecules present in a drop ofwater (volume 0.0018 ml) at room temperature is:—

A

6.023 × 1019

390
Q

●The most malleable metal is:—

A

Gold

391
Q

●The oil used in the froth floatation process is:—

A

PineOil

392
Q

●The mass of one Avogadro number of helium atom is:—

A

4.00 gram

393
Q

●The items amenable to detection by soft x-rays are:—

A

genuine coins from counterfeit coins

394
Q

●The material which can be deformed permanently byheat and pressure is called a:—

A

Thermoset

395
Q

●The mass number of a nucleus is:—

A

the sum of thenumber of protons and neutrons present in thenucleus

396
Q

●The inexpensive and commonly used variety of glassis called soda glass. It is called so because: —

A

ismade using soda (sodium carbonate)

397
Q

●The gas used in the manufacture of Vanaspati fromvegetable oil is:—

A

Hydrogen

TRAIN-WAY (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions