PCP Flashcards
1
Q
Primary alcohol can be derived from the reaction of Grignard reagent with?
A
Methanal
2
Q
How many forms does alkanes have?
A
3
3
Q
Used to measure the tendency of fuel to knock.
A
Octane number
4
Q
In an aldehyde containing substance, under Tollen’s test, what would be the expected result to confirm its positivity
A
Silver mirror
5
Q
Hybrid orbitals in alkynes
A
sp
6
Q
How many atoms does freon have?
A
5
7
Q
Alum, a coagulant of water, is
A
Aluminum sulfate
8
Q
A waste treatment process which does not need oxygen.
A
Pyrolysis
9
Q
The decree on pollution control issued in 1976 is
A
PD 984
10
Q
Ozone, O3, filters out large amount of the ultravoilet and other dangerous radiations from the sun. It is found in the
A
Stratosphere
11
Q
Which treatment of waste is appropriate to effect soluble organic removal?
A. Activated sludge
B. Diatomic filtration
C. Ion exchange
D. Electrodialysis
A
Activated sludge
12
Q
Which of the following is a physical method of water treatment?
A. Sedimentation
B. Precipitation
C. Activated sludge process
D. Chlorination
A
Sedimentation
13
Q
Trace metal that causes the Minamata disease
A
Hg
14
Q
Japanese word meaning “ouch ouch” and is caused by exposure to cadmium
A
Itay-itay
15
Q
An act regulating garbage disposal, also known as the Ecological Solid Waste Management Act of 2000
A
RA 9003
16
Q
It is used as an antiknock additive to fuel and is a bioaccumulative
A
Tetraethyl lead
17
Q
A type of microoganism used for monitoring the pathogenic property of water
A
Coliform
18
Q
It is a term used to describe the over-abundance in the growth of algae in water due to the presence of excess nutrients
A
Eutrophication
19
Q
This phenomenon is described by the separation of hot and cold regions in a given stream
A
Thermal stratification
20
Q
The hardness of water is expressed as g/L of?
A
CaCO3
21
Q
The international Standards on Quality Management and Quality Service is
A
ISO 9000
22
Q
Which compound gives a foul (rotten egg) odor?
A. Hydrogen sulfide
B. Methane
C. Carbon monoxide
D. Carbon dioxide
A
Hydrogen sulfide
23
Q
Which of the following is not a characteristic of hazardous waste?
A. Toxicity
B. Solubility
C. Flammability
D. Corrosiveness
A
Solubility
24
Q
Which of the following are major components of photochemical smog?
A NOx and hydrocarbon
B SOx and hydrocarbon
C ozone and oxygen
D NOx, SOx and hydrocarbon
A
NOx and hydrocarbon
25
The biological decomposition of organic matter accompanied by the production of foul smelling products in an anaerobic condition is
Putrefaction
26
A comprehensive program of action adopted by governments at the United Nations Conference on Environment (also known as Earth Summit in Rio) is
Agenda 21
27
Ozone is important because it
Creates a protective coverage against ultraviolet rays
28
Ozone is all of the following except
A bleaching agent
B less soluble in water than oxygen
C oxidizing agent
D disinfectant
Less solublein water than oxygen
29
A wastewater contains 10 ppm of choride ions, how many mg/L is it?
A 10
B 30
C 14
D 20
10
30
Which of the ff does not affect the amount of dissolved oxygen in water
A heat
B chlorides
C dissolved minerals
D biooxidizable organics
Chlorides
31
Defined limits of waste discharges, e.g., in terms of volume content of contaminants, temp, and the like.
A methylene blue number
B assimilative capacity
C effluent standards
D none of these
Effluent standards
32
Tertiary treament of wastewater include the ff, except
A adsorption
B ion exchange
C reverse osmosis
D filtration
Filtration
33
Small ponds, less than 1 meter deep, whose oxygen supply primarily comes from photosynthetic activity.
A Facultative ponds
B Anaerobic ponds
C Aerated ponds
D Aerobic ponds
Facultative ponds
34
The ratio of oxygen required for stabilization of sewage is called
Relative stability
35
In an Imhoff Tank
the sludge and raw sewage are not mixed
36
Most of the bacteria in sewage are
Saphrophytic
37
The percent of total solids in most domestic sewage is
0.1%
38
In the design of grit chambers
A temperature is an important factor
B baffles are essential
C the detention period should at least be 30 mins
D the maximum velocity of flow is 1 feet per second
D the maximum velocity of flow is 1 feet per second
39
What is found in hard water?
Ca and Mg
40
The gas sludge digestion tanks is mainly composed of
Methane
41
Also known as the Philippine Clean Air Act
RA 8749
42
It is a key component of photochemical smog. Although it is essential UV screen in the upper atmosphere, it is an undesirable pollutant in the troposphere
O3
43
It refers to waste or scrap glass
Cullet
44
HCl reacts vigorously with this compound to form polyvinyl chloride.
Ethyne
45
Acid and alcohol are obtained by the hydrolysis of
Ester
46
The IUPAC name of compound having the formula (CH3)2CHCH2CH2Br is
1-bromo-3-methylbutane
47
How many atoms are there in a molecule of sucrose?
45
48
Which of the ff is not a derivative of benzene?
A naphthalene
B anthracene
C phenanthrene
D bromomethane
Bromomethane
49
How many atoms are there in a molecule of naphthalene?
18
50
Which of the ff is a derivative of carboxylic acid?
A amine
B ester
C aldehyde
D alcohol
Ester
51
Teflon is made from
Polytetrafluoroethylene
52
A benzene ring with one hydrogen removed
Phenyl
53
The Lucas test is used to determine the types of
Alcohols
54
Which has the most number of carbon atoms: trichloromethane, dichloromethane or chloromethane?
All the same
55
Which of the ff has the highest normal boiling point?
A butene
B ethene
C pentene
D propene
Pentene
56
In which organic compound are sp hybrid present?
A ethane
B ethyne
C butene
D propene
Ethyne
57
Styrene is
Vinyl benzene
58
Dichloromethane is also known as
Methylene chloride
59
Ethylene readily undergoes the following type of reaction
Addition
60
Methychloride is represented by
CH3Cl
61
Bonding between carbon atoms are
A electrovalent and strong
B electrovalent and weak
C covalent and strong
D covalent and weak
Covalent and strong
62
Esterification is the reaction of carboxylic with
Alcohol
63
Name the compound with general formula RCOOR
Ester
64
Which organic compound has the functional group -COOH
A ether
B aldehydes
C ketones
D acids
Acids
65
The decreasing order of acidity of the following hydrocarbons: propane, propene and propyne
Propyne>propene>propane
66
To which of the following group does soap belong?
A. Ester
B. Amines
C. Salts of organic acids
D. Aldehydes
Salts of organic acids
67
Which of the ff types of reactions occur when a reactant has got a double bond?
A. Addition
B. Photolysis
C. Substitution
D. Polymerization
Addition
68
Used to determine the molecular weight of an oil
Saponification number
69
Polymers that favor crystallization are least likely to have which of the ff?
A. An atactic configurations of side group?
B. Small side groups
C. Only one repeating unit
D. Small chain lengths
An atactic configurations of side groups
70
What is the major air pollutant emitted by vehicles?
CO
71
Entropy of vaporization for substances is determined to be constant, the value is _____.
21 cal/mol-k
72
In the kinetic molecular theory of gases, which of the ff statements concerning average speeds is true?
A. Most of the molecules are moving at the average speed
B. Any given molecule moves at the average speed most of the time
C. When the temperature increases, more molecules will move at the new average speed
D. When the temperature increases, fewer molecules will move at the new average speed
C. When the temperature increases, more molecules will move at the new average speed
73
If common salt, NaCl, is dissolved in water, which of the following statements is true about the behaviour of pure water?
A. Boiling point is lowered
B. Melting point increases
C. Freezing point decreases
D. Vapor pressure increases
C. Freezing point decreases
74
The radiation that produces the greatest number of ions as it passes through matter is
A. Omega
B. Alpha
C. Beta
D. Gamma
Alpha
75
What is the law that governs ideal gas-liquid solutions?
Raoult's law
76
Which of the ff statements about ideal gases is incorrect?
A. The mole fraction is equal to weight fraction
B. The mole fraction is equal to volume fraction
C. The mole fraction is equal to the pressure
fraction
D. None of these
A. The mole fraction is equal to weight fraction
77
Formula of acrylonitrile
C3H3N
78
Carbon number is
Number of carbon atom
79
Obtain from methane or the action of CS2
Carbon tetrachloride
80
How many sigma bonds are there in ethylene?
More than 3
81
Name
```
CH3
|
CH3-- C -- CH3
|
CH3
```
neo-pentane
82
Which if the ff would you expect to have the highest boiling point?
Formuc acid
Ethanol
Oxalic acid
Acetic acid
Acetic acid
83
Which of the ff is a homogenous mixture?
1. Water
2. Water and alcohol
3. Air
2. Water and alcohol
| 3. Air
84
Water is a ______ molecule
Triatomic
85
Transition are found in the
A. d and f block
B. s block
C. p block
D. d-block
d and f block
86
An atomic bond resulting from the formation of a molecular orbital head-on collision of atomic orbitals
Sigma bonda
87
Which does not belong to the group
A. Cu
B. Si
C. B
D. As
Cu
88
The most abundant element in the solar system
Hydrogen
89
(P1V1)/T1=(P2V2)/T2 is
Combined Boyle's and Charle's law
90
Which of the ff does not belong to the group?
A. B
B. Mg
C. As
D. Si
Mg
91
H+ is a ______.
Proton
92
The purest form of iron
Wrought iron
93
Who was credited for the discovery of oxygen?
J.B. Priestly
94
The science dealing with the study of phenomena at very low temperarures is known as
Cryogenics
95
Ionic solids are (soft/hard) materials of (low/high) melting point
High, high
96
What bond posses the highest thermal and electrical conductivity
Metallic bond
97
A salt is hammered into pieces is a characteristic of a material pertaining to its
Brittleness
98
Which of the ff is the simplest matter?
A. Gas
B. Solid
C. Liquid
D. Any of the three
D. Any of the three
99
Gasoline does not dissolve in water because it contains
Alkanes
100
The melting point and boiling point of halogens (increase/decrese) with increasing (atomic/mass) number.
The melting point and boiling point of halogens increase with increasing mass number.
101
Bauxite us an oxide mineral of
Al
102
Hydrogen is how many percent on the earth's crust
1% by weight
103
When the temperature of a solid is raised, it expands in all directions. Certain crystals are found to have different expansivities along different axes. However, many of the common materials have the same properties in all directions. The latter substances are called
Isotropic substances
104
The liquid oxygen boils at
-183 degree Celsius
105
What is false about hydrogen
A. Dissolves readily in water
B. Colorleas gas
C. High diffusivity
D. Odorless gas
Dissolves readily in water
106
Ozone is readily dissolved in
A. Water
B. Kerosine oil
C. Turpentine oil
D. Xanthate oil
Turpentene oil
107
Which of the ff has compounds which are more often colored?
A. Alkali metals
B. Alkaline earth metals
C. Halogens
D. Transition metals
Transition metals
108
The following exhibit polar covalent bonds, except
A. Na2O
B. H2O
C. HF
D. NO2
Na2O
109
Among the intermolecular forces if attraction, which one is present in CCl4?
A. LDF
B. H-bonding
C. Dipole-dipole forces
D. Network covalent
LDF
110
Which of the df is not true about hydrides?
A. Very basic
B. Reacts readily with compounds having even weakly acidic protons to form H2
C. Used as covenient source of H2
D. All are correct
All are correct
111
Which of the ff when present in water can lead to brown staining in sanitary ware?
Fe and Mg
112
In which of the ff is the size if particles increasing?
Colloids,solution, suspension
Solution, suspension, colloids
113
Which of the ff is the most polar bond?
A. N-O
B. C-H
C. C-C
D. H-F
H-F
114
The pair of electrons which do not participate in the non-bonding is called
A. Ion pair of non-bonding electrons
B. Covalent bond
C. Ionic bond
D. Bonding electrons
Ion pair or non-bonding pair
115
Which is semiconductor?
A. B
B. Ge
C. Si
D. All of these
All of these
116
A chemical reaction which requires heat to produce products
Endothermic reaction
117
It deffines as the tendency of an atom to attract electrons
Electronegativity
118
Dispersion of solid or liquid particles of microscopic size in a gas media such as smoke is a/an
A. Soot
B. Mist
C. Vapor
D. Aerosol
Aerosol
119
It is a proton donor
A. Arrhenius acid
B. Bronsted acid
C. Lewis acid
D. Acetic acid
Bronsted acid
120
Which of the ff has the highest affinity of electrons
A. Na
B. Cl
C. Br
D. K
Cl
121
Elements in a given period have the same
A. Atomic weight
B. Maximum azimuthal quantum number
C. Maximum principal quantum number
D. Valence electron structure
Maximum principal quantum number
122
Electron affinity is defined as
The change in energy when a gaseous atom in its grounds state gain an electron
123
Which of the ff is an extensive property?
A. Molar volume
B. Enthalpy
C. Vapor pressure
D. Boiling point
Enthalpy
124
A triple bond consist of
1 sigma bond and 2 pi bonds
125
Colligative properties depend on
Number if solute particles
126
A yellowish gas
Chlorine
127
Which of the ff is the lightest?
A. Alpha particle
B. Beta particle
C. Proton
D. Hydrogen
Beta particles
128
Group 1R is also known as
Alkali metals
129
Ascorbic acid is what vitamin
Vitamin C
130
Retinal, retinoland retionoic acid are stable form of
Vitamin A
131
Which of the ff is a ketose
A. Fructose
B. Sucrose
D. Glucose
C. Maltose
Fructose
132
Heat loving organisms
Thermophiles
133
It is derived from papaya and is a natural meat tenderizer
Papain
134
Common microoganism used for penicillin manufacture is
Mold
135
Synthetic oil of wintergreen contains
Methyl salicylate
136
It brings about fermentation of milk
Lactobacilli
137
An example of water soluble vitamin
Vit. C
138
The fluid occupying the whole portion of a cell
A. Ribosones
B. Cytoplasm
C. Vaccoule
D. Lysosome
Cytoplasm
139
Biological compound which are solubles in nonpolar solvent but insoluble in water
Lipids
140
When growth of microorganism is inhibitedby the presenceof another, it is known as
Parasitism
141
The simplest type of carbohydrate
Glucose
142
The product obtained from the hyrdolysis of collagen is
Gelatin
143
What is the color of hemoglobin
Red
144
Which of the following acts as hydrogen carrier in metabolic reactions
A. ATP
B. NAD
C. DNA
D. CDP
NAD
145
Organic matter which constitutes about 40-60% of animals organisms
Protein
146
Which of the ff enzymes is used as a meat tenderizer
Papain
147
Materials in which microorganism are grown in a laboratory is
Culture media
148
Groups of microoganism that grow best in the presence of low oxygen concentration are
Microaerophiles
149
Gelatin came from
Collagen
150
Which of the following is the other name of vitamin C
Ascorbic acid
151
Milk taste sour when kept in the open for some time due to the formation of
Lactic acid
152
Steroids which plays an important role in biological reactions is a/an
Hormone
153
Who was credited for the discovery of oxygen?
J.B. Priestly
154
The science dealing with the study of phenomena at very low temperarures is known as
Cryogenics
155
Ionic solids are (soft/hard) materials of (low/high) melting point
High, high
156
What bond posses the highest thermal and electrical conductivity
Metallic bond
157
A salt is hammered into pieces is a characteristic of a material pertaining to its
Brittleness
158
Which of the ff is the simplest matter?
A. Gas
B. Solid
C. Liquid
D. Any of the three
D. Any of the three
159
Gasoline does not dissolve in water because it contains
Alkanes
160
The melting point and boiling point of halogens (increase/decrese) with increasing (atomic/mass) number.
The melting point and boiling point of halogens increase with increasing mass number.
161
Bauxite us an oxide mineral of
Al
162
Hydrogen is how many percent on the earth's crust
1% by weight
163
When the temperature of a solid is raised, it expands in all directions. Certain crystals are found to have different expansivities along different axes. However, many of the common materials have the same properties in all directions. The latter substances are called
Isotropic substances
164
The liquid oxygen boils at
-183 degree Celsius
165
What is false about hydrogen
A. Dissolves readily in water
B. Colorleas gas
C. High diffusivity
D. Odorless gas
Dissolves readily in water
166
Ozone is readily dissolved in
A. Water
B. Kerosine oil
C. Turpentine oil
D. Xanthate oil
Turpentene oil
167
Which of the ff has compounds which are more often colored?
A. Alkali metals
B. Alkaline earth metals
C. Halogens
D. Transition metals
Transition metals
168
The following exhibit polar covalent bonds, except
A. Na2O
B. H2O
C. HF
D. NO2
Na2O
169
Among the intermolecular forces if attraction, which one is present in CCl4?
A. LDF
B. H-bonding
C. Dipole-dipole forces
D. Network covalent
LDF
170
Which of the df is not true about hydrides?
A. Very basic
B. Reacts readily with compounds having even weakly acidic protons to form H2
C. Used as covenient source of H2
D. All are correct
All are correct
171
Which of the ff when present in water can lead to brown staining in sanitary ware?
Fe and Mg
172
In which of the ff is the size if particles increasing?
Colloids,solution, suspension
Solution, suspension, colloids
173
Which of the ff is the most polar bond?
A. N-O
B. C-H
C. C-C
D. H-F
H-F
174
The pair of electrons which do not participate in the non-bonding is called
A. Ion pair of non-bonding electrons
B. Covalent bond
C. Ionic bond
D. Bonding electrons
Ion pair or non-bonding pair
175
Which is semiconductor?
A. B
B. Ge
C. Si
D. All of these
All of these
176
A chemical reaction which requires heat to produce products
Endothermic reaction
177
It deffines as the tendency of an atom to attract electrons
Electronegativity
178
Dispersion of solid or liquid particles of microscopic size in a gas media such as smoke is a/an
A. Soot
B. Mist
C. Vapor
D. Aerosol
Aerosol
179
It is a proton donor
A. Arrhenius acid
B. Bronsted acid
C. Lewis acid
D. Acetic acid
Bronsted acid
180
Which of the ff has the highest affinity of electrons
A. Na
B. Cl
C. Br
D. K
Cl
181
Elements in a given period have the same
A. Atomic weight
B. Maximum azimuthal quantum number
C. Maximum principal quantum number
D. Valence electron structure
Maximum principal quantum number
182
Electron affinity is defined as
The change in energy when a gaseous atom in its grounds state gain an electron
183
Which of the ff is an extensive property?
A. Molar volume
B. Enthalpy
C. Vapor pressure
D. Boiling point
Enthalpy
184
A triple bond consist of
1 sigma bond and 2 pi bonds
185
Colligative properties depend on
Number if solute particles
186
A yellowish gas
Chlorine
187
Which of the ff is the lightest?
A. Alpha particle
B. Beta particle
C. Proton
D. Hydrogen
Beta particles
188
Group 1R is also known as
Alkali metals
189
Ascorbic acid is what vitamin
Vitamin C
190
Retinal, retinoland retionoic acid are stable form of
Vitamin A
191
Which of the ff is a ketose
A. Fructose
B. Sucrose
D. Glucose
C. Maltose
Fructose
192
Heat loving organisms
Thermophiles
193
It is derived from papaya and is a natural meat tenderizer
Papain
194
Common microoganism used for penicillin manufacture is
Mold
195
Synthetic oil of wintergreen contains
Methyl salicylate
196
It brings about fermentation of milk
Lactobacilli
197
An example of water soluble vitamin
Vit. C
198
The fluid occupying the whole portion of a cell
A. Ribosones
B. Cytoplasm
C. Vaccoule
D. Lysosome
Cytoplasm
199
Biological compound which are solubles in nonpolar solvent but insoluble in water
Lipids
200
When growth of microorganism is inhibitedby the presenceof another, it is known as
Parasitism
201
The simplest type of carbohydrate
Glucose
202
The product obtained from the hyrdolysis of collagen is
Gelatin
203
What is the color of hemoglobin
Red
204
Which of the following acts as hydrogen carrier in metabolic reactions
A. ATP
B. NAD
C. DNA
D. CDP
NAD
205
Organic matter which constitutes about 40-60% of animals organisms
Protein
206
Which of the ff enzymes is used as a meat tenderizer
Papain
207
Materials in which microorganism are grown in a laboratory is
Culture media
208
Groups of microoganism that grow best in the presence of low oxygen concentration are
Microaerophiles
209
Gelatin came from
Collagen
210
Which of the following is the other name of vitamin C
Ascorbic acid
211
Milk taste sour when kept in the open for some time due to the formation of
Lactic acid
212
Steroids which plays an important role in biological reactions is a/an
Hormone
213
Clausius clapeyron general equation
dP/dT = delta S/ delta V
214
Ice is _______ dense than liquid H2O
Less
215
At 2.1 Gpa, 100C, water is
Solid
216
Super critical CO2 is used in
Extraction
217
The only substance that has a liq-liq boundary curve
Helium
218
Superfluid liquid with zero viscosity
Helium
219
Protein is the main constituent of
A. Lemon
B. Milk
C. Fruits
D. Vegetables
Milk
220
Glucose on reduction yields
Sorbitol
221
The fermentation of glucose with yeast, results in the formation of
Ethyl alcohol
222
Site for protein synthesis
Cytoplasm
223
Organisms which can thrive on an entirely inorganic diet using CO or carbonates as a source of carbon are called
Autotrophs
224
The destruction of an enzymes catalytic power by changing its molecular structure is
Denaturation
225
An enzyme present in soybeans which converts urea quantitatively into ammonium carbonate
Urease
226
Which of the ff enzymes gives flavor in cheese?
A. Lactose
B. Invertase
C. Lipase
D. Amylase
Lipase
227
Bacteria which converts alcoholic solution to vinegar is
Acetobacter
228
Which of the following is a biological catalyst and it is a protein
A. Hormone
B. Vitamins
C. Enzymes
D. Nucleotides
Enzymes
229
Greek word for "salt forming"
Halogen
230
Who discovered radium?
Marie Curie
231
Aqua regia is a mixture of
Nitric and hydrochloric acid
232
Mayonnaise and milk are examples of
A. Emulsion
B. Colloid
C. Suspension
D. Mixture
Emulsion
233
Colloidal dispersion has ___ phase/s while a suspension has ___ phase/s
2 and 2
234
Which of the ff has no definite structure?
A. Crystalline
B. Amphoteric
C. Amorphous
D. Allotroph
Amorphous
235
Who discovered positron
Anderson
236
How many halogens are there in period three?
1
237
It is a substance that yields hydronium ions in a aqueous solution
Arrhenius acid
238
Which of the ff metals has the highest specific heat capacity at 100C?
A. Al
B. Cu
C. Bi
D. Fe
Al
239
Hydrogen is how many percent on the Earth's crust?
0.9%
```
***
Oxygen 49.5
Silicon 25.7
Aluminum 7.5
Iron 4.7
Calcium 3.4
Sodium 2.6
Potassium 2.4
Magnesium 1.9
Other <1
```
240
Pig iron is essentially the same as
Wrought iron
241
The first derivative of kinetic energy with respect to time is
Power
242
Which of the ff does not belong to the group?
A. Energy
B. Work
C. Force
D. Heat
Force
243
Which of the ff has the lowest boiling point?
A. H2O
B. H2S
C. H2Te
D. H2Se
H2S
*refer to HB for BP values
244
The change in direction of a light ray due to change in speed is
A. Diffraction
B. Refraction
C. Reflection
D. Rarefraction
Refraction
245
The chemical most commonly used to speed sedimentation of sewage is
Lime
246
The second is the duration of radiation of what radioactive element?
A. Mg
B. Cs
C. Kr
D. Pt
Cs
* check your periodic (number of stable isotope)
* Cs has only 1 stable isotope
247
Which dies not belong to the group?
A. Newton
B. Dyne
C. Slug
D. Pound
Slug
248
The curie is a measure of the
Number of disintegration per second of a radioactive substance
249
SI unit for radioactivity is
Becquerel
250
Which of the ff is not true about precipitation?
A. It is dynamic
B. Goes toward equilibrium
C. Not time dependent
D. Rate of precipitation can determine the properties of the product
D
251
When CO2 is bubbled through water, what compound forms?
H2CO3
252
Another name for specific gravity
Relative density
253
How many electrons are there in a helium atom?
2
254
Synthetic oil of wintergreen contains
Methyl salycilate
255
Which of the following substance is always produces when an active metal reacts with water?
H2
256
In a phase diagram for two miscible substances, composition of the liquid phase is equal to that of the solid phase at which of the ff?
A. Eutectic pt
B. Azeotropic pt
C. Freezing pt
D. Triple pt
Eutectic point
257
The properties of light cam best be explained by assuming that light is composed of: (I) particles; (II) waves; (III) atonality
I and II
258
The transport number of an ion is determined using which method?
Hittorf's method
259
What is kaolinite?
Aluminum silicate (HB)
260
Hardness of diamond is due mainly to a large amount of
A. Covalent bond
B. Hydrogen bond
C. Ionic bond
D. Sigma bond
Covalent bond
261
Wood alcohol is
A. Methanol
B. Ethanol
C. Grain alcohol
D. 2-propanol
Methanol
262
Which of the ff will evaporate easily in a dry cloth?
A. Water
B. Diethyl ether
C. Acetone
D. Oil
Diethyl ether
263
200 ppm is equivalent to ___ mg/L
200
264
Which of the ff is a ketose?
A. Fructose
B. Sucrose
C. Glucose
D. Maltose
Fructose
265
Which isotope is particularly usef for both diagnostic and therapeutic work with thyroid gland?
A. Cobalt-60
B. Iodine-131
C. Technetium-99 m
D. Tritium
B
266
Plasticizers are
A. Polymers that have elastic properties
B. Polymers that soften on heating
C. Molecules that confer pliability on otherwise brittle polymers
D. Extremely toxic
C. Molecules that confer pliability on otherwise brittle polymers
267
Gasoline is a
A. Single, complex hydrocarbon
B. Mixture of fee simple hydrocarbon
C. Mixture of few complex hydrocarbons
D. Mixture if large number of hydrocarbon
D. Mixture if large number of hydrocarbon
268
Which pollutant contributes significantly to the formation of acid rain?
A. SO2
B. NH3
C. CO
D. Hydrocarbons
SO2
269
Which of the ff analyses provides a measure if the biodegradable material present in water
A. COD
B. pH
C. BOD
D. Hardness
BOD
270
Another instrument besides a Geiger counter that is useful in detecting radiations
Dosimeter
271
A radioactive isotope that is now widely used in cancer treatment
Cobalt-60
272
When a solid has a crystalline structure, the atoms areanged in repeating structure is called
A. Lattice
B. Unit cell
C. Crystal
D. Domain
Unit cell
273
The distinct pattern in space which the atoms of metal arranged themselves when they combine to produce a substance recognizable size?
Space lattice
274
Most abundant element in solar system
H
275
The property of a porous body which permits a gas or a liquid to flow through it is
A. Diffusion
B. Osmosis
C. Permeability
D. Viscosity
Permeability
276
What is the pH of natural rain water?
5.6-6.2
277
When carbon dioxide is dissolved in water it will form
Carbonic acid
278
Major component of acid rain
NOx and SOx
279
One sample of a soln with a pH 10 is tested with phenolphthalein and another is tested with lithmus paper. In this soln the colors are
Lithmus - blue
| W/ phenolphthalein - pink
280
Produce comercially by Haber process
Ammonia
281
Type of radiation will be stopped by a piece of paper?
Alpha
282
Atoms of which element have the the highest first ionization energy?
A. Ca
B. K
C. Na
D. Mg
Mg
283
The most penetrating radiation is
Gammay ray
284
Alkanes are soluble in all except
A. Chloroform
B. Water
C. Ether
D. Benzene
Water
285
One would expect the ff alkene to be CH3-CH2-CH=CH-CH3
A. Gas
B. Solid
C. Liquid
D. Blue in color
Liquid
286
CH2=CHCOOH name
Propenoic acid
287
Which of the ff is the most acidic?
A. ROH
B. HOH
C. NH3
D. RCOOH
RCOOH
288
The energy needed to remove the most loosely bonded electron of an atom is the
Ionization energy
289
Who stated that the properties of elements are periodic functions of their atomic weight not atomic number?
Dmitri Mendeleev
290
Atomic number is equal to
Number of protons
291
Two major types of chemical bonds observed in chemical bonding:ionic and covalent. Which of the ff has a bond that is least ionic character
A. NaCl
B. CH4
C. H20
D. H2
H2
292
One atomic mass unit is equivalent to ___ of the atomic weight carbon.
1/12
293
Calcium carbonate is also known as
Chalk
294
Which of the ff has the least strength?
A. Covalent bond
B. Electrovalent bond
C. Ionic bond
D. Van der waals bond
VDW
295
Which of the ff is the most electronegative
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Fluorine
296
An uneven sharing of electrons between two atoms indicate
Polarity
297
All of the ff are colligative properties, except
A. Solubility
B. Vapor pressure lowering
C. Freezing point depression
D. Boiling point elevation
Solubility
298
The number that expresses the oxidation state of an atom of an element or groups of atoms is called
Valence
299
Lewis base is
Donates electron pair
300
The composition of the nucleus of deuterium is
One proton and one neutron
