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TRAIN-WAY > RL CHEM 3 > Flashcards

RL CHEM 3 Flashcards

1
Q

●The graphite rods in the nuclear reactor: —

A

convertfast moving neutrons into thermal neutrons

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2
Q

●The first metal used by man was:—

A

Copper

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3
Q

●The hydronium ion is:—

A

H3O+

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4
Q

●The most electropositive elements among thefollowing is:—

A

Cs

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5
Q

●The method that cannot be used for removingpermanent hardness of water is:—

A

Boiling

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6
Q

●Zone refining is used for the purification of:—

A

Ge

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7
Q

●Metal are good conductors, because: —

A

they containfree electrons

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8
Q

●Tear gas is:—

A

Carbonyl Chloride

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9
Q

●A polymeric substance used to make parachute is:—

A

Viscose

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10
Q

●Drinking soda is:—

A

Acidic

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11
Q

●The cathode of a lead storage battery is made up of:—

A

Lead

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12
Q

●Heat resistant variety of glass is:—

A

Flint Glass

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13
Q

●Pasteurization of milk means: —

A

Heating of milk toabove 620 C

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14
Q

●Type metal used in printing press is an alloy of: —

A

lead and antimony

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15
Q

●Sour taste of Coca Cola is due to the presence of: —

A

Phosphoric acid

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16
Q

●Bhopal gas tragedy is associated with leakage of: —

A

Methyl Isocyanate

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17
Q

●Iodized salt is beneficial for:—

A

Thyroid function

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18
Q

●The acid rain destroys vegetations because itcontains: —

A

Sulphuric acid

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19
Q

●Diamonds are glittering and attractive because lightincident on them undergoes:—

A

multiple internalreflections

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20
Q

●The substance most commonly used as a foodpreservative is:—

A

Sodium salt of benzoic acid

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21
Q

●The acid used in lead storage cells is:—

A

Sulphuricacid

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22
Q

●Alum stops bleeding in minor cuts because of:—

A

Coagulation

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23
Q

●Plaster of Paris is made by partial dehydration of: —

A

Gypsum salt

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24
Q

●Water can be separated from alcohol water mixtureby: —

A

Distillation

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25
Q

●Hydrogen is not found in atmosphere because: —

A

It isthe lightest gas

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26
Q

●A substance which readily forms colloidal solution incontact with water is called:—

A

Hydrophilic acid

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27
Q

●When formaldehyde and potassium hydroxide areheated, we get:—

A

Methyl alcohol

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28
Q

●When conc H2S04 is added to dry KN03, brownfumes are evolved. These fumes are due to:—

A

NO2

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29
Q

The luster of the metals is because of : —

A

reflection oflight due to the presence of free electrons

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30
Q

●The major harmful gas emitted by automobilevehicles which causes air pollution is:—

A

CarbonMonoxide

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31
Q

●Pasteurization is the process in which milk is heatedto:—

A

630 C for 20 minutes

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32
Q

●The freezer in a refrigerator is fitted near the topbecause:—

A

it facilitates convection currents

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33
Q

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

A

Argon

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34
Q

●Percentage of lead in lead pencils is:—

A

0

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35
Q

●Water is not effective in extinguishing a fire causedby petrol because: —

A

water and petrol areimmiscible with each other and petrol whichforms the upper layer continues to burn

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36
Q

●Helium gas is used in gas balloons instead ofhydrogen gas because it is:—

A

Non-combustible

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37
Q

●The gas used in the artificial ripening of fruits is: —

A

Acetylene

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38
Q

●Ruby and Sapphire are oxides of:—

A

Aluminium

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39
Q

●Gunpowder consists of a mixture of: —

A

Niter,Sulphur and Charcoal

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40
Q

●In nuclear reactors, graphite is used as a/an:—

A

Moderator

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41
Q

●The compound to which H2 does not add is: —

A

Tetraphenyl ethylene

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42
Q

●Ammonal is a mixture of:—

A

aluminium powder andammonium nitrate

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43
Q

●Which gas does not form the part of atmosphere?—

A

Chlorine

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44
Q

●The fuel used in an atomic reactor is:—

A

Uranium

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45
Q

●The major constituent of Gobar gas is:—

A

Methane

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46
Q

●The residue left after extracting juice from sugarbeetand sugarcane is called:—

A

Bagasse

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47
Q

●The isotope of Uranium used in atomic reactors is:—

A

U235

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48
Q

●The greenhouse effect is caused by the higher level ofwhich gas in the atmosphere?—

A

Carbon dioxide

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49
Q

●Ethanol containing 5% water is known as: —

A

Rectified spirit

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50
Q

●The amount of chlorine available in water afterdisinfection is called as:—

A

Residual chlorine

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51
Q

●What are the major pollutants of Cigarette smoke?—

A

Carbon monoxide and Nicotine

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52
Q

●Nuclear energy is a mineral-based energy source. It isderived from:—

A

Uranium, thorium andPlutonium

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53
Q

●Zinc sulphide is commonly used as:—

A

Rodenticide

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54
Q

●Aspirin is chemically known as:—

A

Acetylsalicylic acid

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55
Q

●The most abundant element in the human body is: —

A

Oxygen

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56
Q

●Wax used for making candle is chemically a mixtureof: —

A

Aliphatic hydrocarbons

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57
Q

●Litmus is obtained from:—

A

lichen

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58
Q

●Vinegar made by fermentation from cane sugarcontains: —

A

Acetic acid

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59
Q

●Photo-oxidation process is initiated by:—

A

Light

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60
Q

●Ultraviolet radiation striking the earth is due to thedepletion of:—

A

Ozone

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61
Q

●Major gaseous pollutant of the thermal power stationis: —

A

SO2

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62
Q

●The process of removing calcium and magnesiumfrom hard water is known as:—

A

Water softening

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63
Q

●The tip of the match-stick contains:—

A

Redphosphorus

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64
Q

●Commercially, sodium bicarbonate is known as: —

A

Baking soda

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65
Q

●An emulsifier is an agent which:—

A

stabilizes asemulsion

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66
Q

●Mortar is a mixture of water, sand and:—

A

Slakedlime

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67
Q

●The National Chemical Laboratory (India) is locatedin: —

A

Pune

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68
Q

●One of the constituents of tear gas is:—

A

Chloropicrin

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69
Q

●An atomic clock is based on transitions in:—

A

Caesium

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70
Q

●Silver halides are used in photographic plates becausethey are:—

A

reduced by light

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71
Q

●Tetra ethyle lead (TEL) is:—

A

An antiknockcompound

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72
Q

●The material used in the manufacture of lead pencilis: —

A

Graphite

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73
Q

●If all bullets could not be removed from gunshotinjury of a man, it may cause poisoning by:—

A

Lead

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74
Q

●German silver, an alloy, does not contain the metal:—

A

Silver

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75
Q

●Oxygen which is vital for life is a product ofphotosynthesis and comes from:—

A

Carbon dioxide

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76
Q

●The noble gas used in radiotherapy is:—

A

Radon

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77
Q

●Steel contains:—

A

0.1 to 2 % carbon

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78
Q

●The chemical(s) most commonly used for cloudseeding or ‘artificial rainmaking’ is/are:—

A

SilverIodide

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79
Q

●White phosphorus is always kept under:—

A

Water

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80
Q

●Galena is a mineral of:—

A

Lead

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81
Q

●Magnalium is an alloy of:—

A

Aluminium andMagnesium

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82
Q

●Dry powder fire extinguishers contain:—

A

Sand andSodium bicarbonate

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83
Q

●Which type of glass is used for making glassreinforced plastic?—

A

Fibre Glass

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84
Q

●Two elements which are used to absorb neutrons tocontrol the chain reaction during nuclear fissionare:—

A

Boron and Cadmium

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85
Q

●The most commonly used chemicals in the artificialrainmaking or cloud seeding are:—

A

Silver Iodide

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86
Q

●Hydrogen bomb is based on the principle of: —

A

Uncontrolled fusion reaction

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87
Q

●Supersonic jet causes pollution by thinning of:—

A

O3layer

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88
Q

●Which of the following metals causes Itai-Itaidisease? —

A

Cadmium

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89
Q

●Glycol is added to aviation gasoline because it: —

A

prevents freezing of petrol

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90
Q

●Which one of the following minerals is found inMonazite sand?—

A

Thorium

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91
Q

●Now a days, yellow lamps are frequently used asstreet lights. Which gas is used in these lamps?—

A

Sodium

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92
Q

●The addition of gypsum to Portland cement helps in:—

A

preventing rapid setting of cement

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93
Q

●The constituents of automobile exhaust that can causecancer is/are:—

A

Lead

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94
Q

●Hard steel contains:—

A

0.5 to 1.5 % Carbon

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95
Q

●Cement is formed by strongly heating a mixture of:—

A

Limestone and clay

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96
Q

●The temperature of oxyacetylene flame is around: —

A

32000 C

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97
Q

●The Refrigerant ‘FREON’ is: —

A

Difluoro DichloroMethane

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98
Q

●Raw materials used for the manufacture of glass are:—

A

Sand, soda and limestone

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99
Q

●The BOD values of water indicate the: —

A

amount ofoxygen used for biochemical oxidation

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100
Q

●Bleaching powder is used in drinking water as a/an:—

A

Disinfectant

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101
Q

●The iron ore which contains 72% of iron is:—

A

Magnetite

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102
Q

●The atmospheric gas that is mainly responsible GreenHouse effect:—

A

Carbon dioxide

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103
Q

●Electric bulbs are filled with:—

A

Argon

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104
Q

●The purest form of Iron is:—

A

Wrought Iron

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105
Q

●Non-stick kitchenware are coated with:—

A

Teflon

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106
Q

●Sea weeds are important source of:—

A

Iodine

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107
Q

●The fiber least prone to catch fire is:—

A

Cotton

108
Q

●The common name for the compound having formatNaOH is:—

A

Caustic Soda

109
Q

●Bone ash contains:—

A

Calcium phosphate

110
Q

●Slag is a name given for:—

A

molten alumina

111
Q

●An example of replenishable energy source is:—

A

Biomass

112
Q

●Tar roads get damaged if there is:—

A

Stagnation ofwater on road

113
Q

●The drug ‘Marijuana’ is a:—

A

Sedative

114
Q

●The material known in commerce as Terylene is a: —

A

Synthetic fibre

115
Q

●The chemical used in embalming biological materialsis: —

A

Formaldehyde in water

116
Q

●Sodium bicarbonate is commercially known as: —

A

Baking Soda

117
Q

●Coal is formed from:—

A

compressed and hardenedbiomass

118
Q

●Commercial Vaseline is derived from:—

A

Petroleum

119
Q

●Colour imparted to the Bunsen flame by strontiumsalt is: —

A

Crimson Red

120
Q

●A potato tuber has been cut into two halves. A fewdrops of iodine solution are placed on the cutsurface of one of the halves. What colour changewill be noticed?—

A

From brown to blue-black

121
Q

●Tear gas used by the police to disperse the mobcontains:—

A

Chlorine

122
Q

Epsom salt is used:—

A

in making tooth paste

123
Q

●The chemical name of rat poison is:—

A

ZincPhosphide

124
Q

●The gas which is mainly responsible for the greenhouse effect is:—

A

Carbon dioxide

125
Q

●Domestic Cooking gas consists mostly of:—

A

Liquefiedbutane and isobutene

126
Q

●Quick Silver is chemically known as:—

A

Mercury

127
Q

●Extensively used nitrogenous fertilizer is:—

A

Urea

128
Q

●Which particle moves around the nucleus of an atomand are negatively charged?—

A

Electrons

129
Q

●Hardest allotrope of carbon is:—

A

Diamond

130
Q

●Name the particle that is most essential to continuethe chain reaction during the fission of uranium.—

A

Neutron

131
Q

●Conversion of chemical energy into electrical energyoccurs in: —

A

A battery

132
Q

●The fuel that is used in modern submarines is: —

A

Nuclear Fuel

133
Q

●The basic chemical building block of natural rubberobtained from trees is:—

A

Isoprene

134
Q

●The name of plastic polymer from which combs, toys,bowls, etc., can be made is:—

A

Polystyrene

135
Q

●Which metal does not undergo corrosion due to theformation of oxide layer?—

A

Aluminium

136
Q

●Molasses, a by-product in the manufacture of sugar,is converted into:—

A

Alcohol

137
Q

●Silver nitrate solution is kept in brown bottles inlaboratory because:—

A

Brown bottles stop thepassage of light through it

138
Q

●Gelatin is mostly used in making ice-creams in orderto: —

A

Stabilize the colloid and preventcrystallization

139
Q

●Two elements which can form a large number ofcompounds are:—

A

Carbon and Hydrogen

140
Q

●An inert gas mixed with oxygen given to patientssuffering from restricted breathing is:—

A

Helium

141
Q

●The fungus which is used in the alcohol industry is:—

A

Yeast

142
Q

●Gold dissolves in:—

A

Aqua-regia

143
Q

●Which halide is used in making sensitive emulsion onphotographic film?—

A

Silver Bromide

144
Q

●The material used in solar cells contains:—

A

Silicon

145
Q

●When lime juice is dropped on baking soda, briskeffervescence takes place because the gas evolvedis:—

A

Carbon dioxide

146
Q

●In the electroplating of gold, the electrolyte used is:—

A

Gold Sulphate

147
Q

●The acid present in red ants is:—

A

Formic acid

148
Q

●The metal extracted from Bauxite is:—

A

Aluminium

149
Q

●pH value between 6.5-7.5 makes the soil:—

A

Basic

150
Q

●The wire of flash bulb is made of:—

A

Magnesium

151
Q

●The coloured discharge tubes for advertisementmainly contains:—

A

Neon

152
Q

●Muscle fatigue is caused by the accumulation of: —

A

Lactic acid

153
Q

●When quick lime is added to water:—

A

heat isliberated

154
Q

●The number of neutrons present in an element havingmass number 226 and atomic number 88 is:—

A

138

155
Q

●The natural resource, known as black gold, is:—

A

Coal

156
Q

●This group of alumino-silicate minerals is widely usedin making electric insulators. Which is it?—

A

Mica

157
Q

●Dry Ice is:—

A

Solid Carbon dioxide

158
Q

●Cement containing excess amount of lime: —

A

cracksduring setting

159
Q

●Which of the following is a micro-element?—

A

Chlorine

160
Q

●Rock salt is a mineral containing:—

A

Sodium

161
Q

●In a nuclear reactor, the material use for absorbingneutrons is:—

A

Cadmium

162
Q

●Solder metal is an alloy of:—

A

Lead and Tin

163
Q

●Copper is refined by:—

A

Roasting

164
Q

●The element with highest first ionization energy is: —

A

Helium

165
Q

●An atom of an element has atomic number 17 andmass number 36. The number of neutrons in itsnucleus is:—

A

19

166
Q

●Seaweeds are important source of:—

A

Iodine

167
Q

The resources which can be used continuously, year-after-year are called:—

A

Renewable resources

168
Q

●Refrigerators keep food unspoiled because: —

A

at itslow temperature, bacteria and moulds are inactive

169
Q

●When Hydrogen starts burning in air, it produces: —

A

Water

170
Q

●Spirit in contact with body gives cool sensationbecause it is: —

A

Highly volatile

171
Q

●Taj Mahal is greatly affected due to:—

A

Acid Rain

172
Q

●The unit of ionic product of water (Kw) is:—

A

Mol2let-2

173
Q

●What is the chemical name of bleaching powder? —

A

Calcium hypochlorite

174
Q

●Alcoholic (—OH) group can be identified by:—

A

FeCl3Test

175
Q

●Pollutant from motor car exhaust that causes mentaldisease is:—

A

Lead

176
Q

●The total energy of revolving electron in an atom: —

A

can never be positive

177
Q

●Conduction band electrons have more mobility thanholes because they:—

A

experience collision lessfrequently

178
Q

●Iodine can be separated from a mixture of Iodine andPotassium Chloride by:—

A

Sublimation

179
Q

●Identify the metal which is non-toxic in nature.—

A

Gold

180
Q

●The gas that usually causes explosion in coal mines is:—

A

Methane

181
Q

●The chemical behavior of an atom depends upon: —

A

the number of electrons orbiting around thenucleus

182
Q

●A powerful eye irritant present in smog is: —

A

Peroxyacetyl nitrate

183
Q

●The most important ore of lead is:—

A

Galena

184
Q

●When water itself combines chemically with someelement or mineral it is called:—

A

Hydration

185
Q

●The electronic configuration of an atom havingatomic number ‘20’ is:—

A

2, 8, 8, 2

186
Q

●The most reactive among the halogens is:—

A

Fluorine

187
Q

●KMnO4 can be used as a:—

A

Disinfectant

188
Q

●Electrolysis of an aqueous solution of copper sulphateusing copper electrodes gives: —

A

Copper atcathode and oxygen at anode

189
Q

●Which inert gase can form compounds?—

A

Xenon

190
Q

●Burning pyrites ore gives out:—

A

Sulphur dioxide gas

191
Q

●Oxygen has (+) oxidation number only in:—

A

OF2

192
Q

●The particle required to continue the chain process ofUranium fission is:—

A

Neutron

193
Q

●The chief source for the production of nitrogenousfertilizers is:—

A

Ammonia

194
Q

●The element used for making solar cells is:—

A

Silicon

195
Q

●Bakelite is a co-polymer of Phenol and:—

A

Formaldehyde

196
Q

●When a spoon is to be electroplated with nickel, thespoon is:—

A

made cathode and a pure nickel red,the anode

197
Q

●Wood spirit is:—

A

Methyl alcohol

198
Q

●Fire fighting clothes are made of:—

A

Asbestos

199
Q

●Water gas is the mixture of:—

A

Carbon monoxide andhydrogen

200
Q

●Which type of fire extinguisher is used for petroleumfire? —

A

Foam type

201
Q

●The function of skimming tank in sewage treatment isto remove:—

A

Oil and fatty substances

202
Q

●Black lung disease occurs in people working in:—

A

Coal mines

203
Q

●The chief source of naphthalene is:—

A

Coal tar

204
Q

●Why water is not suitable for putting out a petrolfire?—

A

Water, being heavy, slips below petrolwhich thus remains in contact with air and burns

205
Q

●Milk is:—

A

Emulsion

206
Q

●The chemical substance present in bones and teeth is:—

A

Calcium phosphate

207
Q

●Maximum permissible concentration of copper indrinking water in mg/L is:—

A

1.0

208
Q

●If lime water is kept in the air, it turns milky due tothe presence of:—

A

Carbon dioxide

209
Q

●Heavy metal pollution of water is caused by:—

A

Paints

210
Q

●The inert gas which is substituted for nitrogen in theair used by deep sea divers for breathing is:—

A

Helium

211
Q

●One carat of diamond is equal to—

A

200 m

212
Q

The process by which milk is converted to curd iscalled: —

A

Fermentation

213
Q

●The technique of calculating the age of fossilorganisms is: —

A

Radiocarbon dating

214
Q

●Nitrogen forms a variety of compounds in alloxidation states ranging from:—

A

3 to +3

215
Q

●The next higher homologue of C6H14 is:—

A

C7H16

216
Q

●The chemical used as a ‘fixer’ in photography is: —

A

Sodium thiosulphate

217
Q

●Yellow Cake, an item of smuggling across border, is:—

A

Uranium Oxide

218
Q

●The difference between a nuclear reactor and anatomic bomb is that: —

A

The chain reaction innuclear reactor is controlled

219
Q

●Physic-chemical characteristics of water in watersources undergo changes due to:—

A

Effluents

220
Q

●The alpha particle carries two positive charge. Itsmass is very nearly equal to that of:—

A

An atom ofhelium

221
Q

●The offending substance in the liquor tragediesleading to blindness is:—

A

Methyl alcohol

222
Q

●The characteristic odour of garlic is due to:—

A

Asulphur compound

223
Q

●The most reactive among the halogens is:—

A

Fluorine

224
Q

●The water pollution in rivers is measured by thedissolved amount of:—

A

Oxygen

225
Q

●Coke is one of the materials of the charge added toblast furnace for the production of steel/iron. Itsfunction is to:—

A

act as the reducing agent

226
Q

●In the production of steel/iron, what is the function ofcoke?—

A

To function as a fuel, supply heat

227
Q

●Barium in a suitable form is administered to patientsbefore and X-Ray examination of the stomach,because:—

A

It is a good absorber of X-Rays andthis helps the stomach to appear clearly incontrast with the other regions in the picture

228
Q

●Cobalt-60 is commonly used in radiation therapybecause it emits:—

A

Gamma Rays

229
Q

●The correct statement is:—

A

To dilute sulphuric acid,acid is added to water and not water to acid.

230
Q

●Large cold storage plants use ____ as refrigerant,while domestic refrigerators usechlorofluorocarbons.—

A

Ammonia

231
Q

●Most of the explosions in mines occur due to themixing of: —

A

oxygen with acetylene

232
Q

●Aluminium surface are often ‘anodized.’ This meansthe deposition of a layer of:—

A

Zinc oxide

233
Q

●Hard water is not suitable for:—

A

washing clotheswith soap

234
Q

●In an atom, the order of filling up of the orbital isgoverned by: —

A

Aufbau’s Principle

235
Q

●An aqueous solution of copper sulphate is acidic innature because the salt undergoes:—

A

Hydrolysis

236
Q

●In a group of elements, what decreases as the atomicweight increases?—

A

Electron affinity

237
Q

●In a given period, what gradually increases along aperiod? —

A

Ionization Potential

238
Q

●A radioactive substance has a half-life of fourmonths. Three-fourth of the substance woulddecay in:—

A

8 months

239
Q

●If we sprinkle common salt on an earthworm, it diesdue to: —

A

osmotic shock

240
Q

●Endosulfan, which has been in news these days, is a:—

A

Pesticide

241
Q

●Gypsum is added to clinker during cementmanufacturing to: —

A

decrease the rate of settingof cement

242
Q

●The main chemical constituent of the oil ofcardamom which is responsible for flavour of thisoil is:—

A

Cineole

243
Q

●The molecule which has the highest percentage ofionic character among the following is:—

A

HF

244
Q

●The high reactivity of fluorine is due to: —

A

its highelectro negativity

245
Q

●The iron ore magnetite consists of:—

A

Fe2O3

246
Q

●The main chemical constituent of clay is:—

A

aluminium silicate

247
Q

●The mineral containing both magnesium and calciumis: —

A

Dolomite

248
Q

The metal does not give H2 on treatment with diluteHCl is: —

A

Ag

249
Q

●The number of g-molecule of oxygen in 6.02 x 1024CO molecules is:—

A

5 gram of molecule

250
Q

●The most extensive, commercially useful source ofthorium as monazite sand occurs in India at:—

A

Travancore Coast

251
Q

●The main active constituent of tea and coffee is:—

A

Caffeine

252
Q

●The maximum number of isomers for an alkene withmolecular formula C4H8 is:—

A

4

253
Q

●The organic reaction represented by equation CH3 -CH = O + H2NOH gives CH3 - CH - NH + H2O isan example of:—

A

a condensation reaction

254
Q

●The hottest part of the gas flame is known as: —

A

non-luminous zone

255
Q

●The human body is made up of several chemicalelements; the element present in the highestproportion (65%) in the body is: —

A

Oxygen

256
Q

●The isomerism which exists between CH3CHCI2 andCH2CI.CH2 CI is:—

A

positional isomerism

257
Q

●The half life period of an isotope is 2 hours. After 6hours what fraction of the initial quantity of theisotope will be left behind? —

A

1/8

258
Q

●The number of waves made by an electron moving inan orbit having maximum magnetic quantumnumber is +3:—

A

4

259
Q

●The number of atoms present in 21.6 gram of silver(atomic weight = 108) are same as the moleculesin:—

A

12 moles of KMnO4

260
Q

●Equal masses of oxygen, hydrogen and methane arekept under identical conditions. The ratio of thevolumes of gases will be:—

A

1 : 16 : 2

261
Q

●The mass number of an atom is equal to: —

A

thenumber of nucleons

262
Q

●The maximum number of covalent formed bynitrogen is:—

A

4

263
Q

●The formula C6H5-CO-CH3 represents:—

A

Acetophenone

264
Q

●The method of concentrating the ore which makesuse of the difference in density between ore andimpurities is called:—

A

Levigation

265
Q

●The inert gases are ____ in water.—

A

Sparingly soluble

266
Q

●The molecular formula of phosphorous is:—

A

P4

267
Q

●The names of the scientists, Newlands, Mendeleev,and Meyer are associated with the developmentof: —

A

periodic table of elements

TRAIN-WAY (27 decks)

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