## general science

### Chemistry MCQ Questions and Answers page - 9

1.
 Hydrogen bomb is based on the principle of A Controlled fission reaction B Uncontrolled fission reaction C Controlled fusion reaction D Uncontrolled fusion reaction Answer : D Explanation :
2.
 Which of the following can be to absorb neutrons to control the chain reaction during nuclear fission  ? A Boron B Heavy water C Uranium D Plutonium Answer : A Explanation :
3.
 The least preferred technique in the disposal of Municipal Solid Waste is A Incineration B Composting C Land filling D Bricketting Answer : D Explanation :
4.
 If water smells bad, then that odour can be removed by adding A Alum B Bleach C Activated carbon D Deactivated nitrogen Answer : C Explanation :
5.
 The working of a dry cell is based on A Decomposition reaction B Spontaneous oxidation reduction reaction C Combination reaction D Electrolysis Answer : D Explanation :
6.
 Which of the following is a characteristic of an exothermic reaction  ? A Release of heat B Absorption of heat C Doesn’t involve any change in temperature D None of the option is correct Answer : A Explanation :
7.
 What is an endothermic reaction  ? A Reaction in which heat is released. B Reaction in which heat is absorbed. C Reaction in which neither heat is released nor absorbed. D None of these Answer : B Explanation :
8.
 The passage of an electric current through a conducting liquid causes  _____________ . A Galvanisation B Evaporation C Physical reaction D Chemical reaction Answer : D Explanation :
9.
 Among the following respiration is which type of process  ? A Exothermic process only B Endothermic process only C Both Exothermic and Endothermic D Neither Exothermic nor Endothermic Answer : A Explanation :
10.
 Which of the following reaction is an example of Exothermic reaction  ? A Burning of natural gas B Respiration C The decomposition of vegetable matter into compost D All options are correct Answer : D Explanation :
11.
 In which type of chemical reaction a single product is formed from two or more reactants  ? A Combination reaction B Decomposition reaction C Displacement reaction D Double displacement reaction Answer : A Explanation :
12.
 What is the name of that technique, which uses radioactivity to decide the period of materials of pre-historic period  ? A Radium dating B Uranium dating C Carbon dating D Deuterium dating Answer : C Explanation :
13.
 An atomic pile is used for A Producing  X-rays B Conducting nuclear fission C Conducting thermonuclear fusion D Accelerating atoms Answer : B Explanation :
14.
 The radioactive element used in heart pace makers is A Uranium B Deuterium C Plutonium D Radium Answer : A Explanation :
15.
 The element which is commonly used in nuclear for producing electricity by nuclear reactors fission is A Radium B Plutonium C Uranium D Deuterium Answer : C Explanation :
16.
 Who developed Hydrogen Bomb  ? A Wernher Von Braun B J. Robert Oppen Heimer C Edward Teller D Samuel Cohen Answer : C Explanation :
17.
 The long range potential of nuclear energy in India depends on its reserves of A Thorium B Uranium C Plutonium D Radium Answer : A Explanation :
18.
 Which of the following elements is non-radioactive  ? A Uranium B Thorium C Plutonium D Zirconium Answer : D Explanation :
19.
 Radioactive disintegration of uranium ultimately results in formation of A Radium B Thorium C Polonium D Lead Answer : D Explanation :
20.
 Which one of the following is radioactive  ? A Cesium B Platinum C Strontium D Thorium Answer : D Explanation :
21.
 In nuclear reactors, graphite is used as  a/an A Fuel B Lubricant C Moderator D Insulator Answer : C Explanation :
22.
 The fuel used in an atomic reactor is A Coal B Petrol C Combustable gases D Uranium Answer : D Explanation :
23.
 Which of the following is  not  a radioactive element  ? A Uranium B Thorium C Radium D Cadmium Answer : D Explanation :
24.
 Nuclear energy is a mineral-based energy source. It is derived from A Uranium B Thorium C Plutonium D All of the above Answer : A Explanation :
25.
 When ice cubes are made, the entropy of water A Does not change B Decreases C Increases D May either increase or decrease depending on the process used Answer : B Explanation :
26.
 Removal of carbon particles from air involves the principle of A Precipitation B Filteration C Electrophoresis D Sedimentation Answer : C Explanation :
27.
 Particulates (<1 μm size) remaining suspended in air indefinitely and transported by wind currents are called A Mists B Fumes C Aerosols D Smoke Answer : C Explanation :
28.
 Name the particle that is most essential to continue the chain reaction during the fission of uranium A Electron B Proton C Neutron D Positron Answer : C Explanation :
29.
 Conversion of chemical energy into electrical energy occurs in A Atomic bombs B Dynamo C A battery D Electric heaters Answer : C Explanation :
30.
 The fuel that is used in modern submarines is A Nuclear B Petrol C Coal D Diesel Answer : A Explanation :
31.
 The energy of the sun is mainly due to A Nuclear fission B Radioactivity C Heat D Nuclear fusion Answer : D Explanation :
32.
 In a nuclear reactor the material use for absorbing neutrons is A Zinc B Radium C Lead D Cadmium Answer : D Explanation :
33.
 The lightest radioactive element is A Deuterium B Polonium C Tritium D Uranium Answer : C Explanation :
34.
 Radioactive elements emit  : A Radio waves B Infrared waves C Ultraviolet waves D $\alpha Answer : D Explanation :
35.
 Which of the following has the highest penetrating power  ? A $\alpha&space;-ray$ B $\beta&space;-ray$ C $\gamma&space;-ray$ D $\delta&space;-ray$ Answer : C Explanation :
36.
 The moderator used in a nuclear reactor is A Uranium B Radium C Ordinary water D Graphite Answer : C Explanation :
37.
 Which of the following elements does not exhibit natural radioactivity  ? A Uranium B Thorium C Aluminium D Polonium Answer : C Explanation :
38.
 The most suitable unit for expressing nuclear radius is  : A Nanometre B Fermi C Angstrom D Micron Answer : C Explanation :
39.
 Chernobyl disaster is the result of pollution by A Oil spill B Acid rain C Carbon dioxide D Radioactive waste Answer : D Explanation :
40.
 Which of the following caused radioactive pollution along the coast of Kerala  ? A Plutonium B Zinc C Thorium D Radium Answer : C Explanation :
41.
 The antiparticle of an electron is A Positron B Proton C Alpha particles D Beta particles Answer : A Explanation :
42.
 Which of the following is used as control rods in Atomic reactor  ? A Sodium B Uranium C Graphite D Boron Answer : D Explanation :
43.
 Which of the following is used for the preparation of dynamite  ? A Methyl alcohol B Iron oxide C Nitro glycerol D Copper sulphate Answer : C Explanation :
44.
 Which of the following is radioactive in nature  ? A Helium B Sodium C Thorium D Platinum Answer : C Explanation :
45.
 Which of the following is used as fuel rods in Atomic reactor  ? A Sodium B Uranium C Graphite D Boron Answer : B Explanation :
46.
 A radioactive substance has a half life of six months. Three-fourth of the substance will decay in  _____________ . A 6 months B 10 months C 12 months D 24 months Answer : C Explanation :
47.
 Which of the following is used as coolant in Atomic reactor  ? A Water B Uranium C Graphite D Boron Answer : A Explanation :
48.
 Which of the following particles were made to fall on a thin gold foil by Ernest Rutherford  ? A Gamma B Beta C Electron D Alpha Answer : D Explanation :
49.
 Which gas is used as a fuel in a rocket  ? A Radon B Hydrogen C Chlorine D Nitrogen Answer : B Explanation :
50.
 Which among the following is a carbohydrate  ? A Nylon B Cane-sugar C Turpentine D Hydrogen peroxide Answer : B Explanation :
51.
 The gas used for artificial fruit ripening of green fruit is – A Ethylene B Acetylene C Ethane D Methane Answer : A Explanation :
52.
 The enzyme that converts glucose to ethyl alcohol is  : A Invertase B Maltase C Zymase D Diastase Answer : C Explanation :
53.
 Silk fibre chemically is  : A Carbohydrate B Fat C Protein D Cellulose Answer : C Explanation :
54.
 Fermentation of milk to curd is due to  : A Mycobacterium B Staphylococcus C Lactobacillus D Yeasts Answer : C Explanation :
55.
 By which organic compound all the oils are known  ? A Carbohydrate B Protein C Hydrocarbon D Ester Answer : C Explanation :
56.
 Milk tastes sour when kept in the open for sometime due to the formation of A Latic acid B Citric acid C Acetic acid D Carbonic acid Answer : A Explanation :
57.
 The natural source of hydrocarbon is A Crude oil B Biomass C Coal D Carbohydrates Answer : A Explanation :
58.
 Which of the following is chiefly present in  LPG  (Liquefied Petroleum Gas)  ? A Methane B Ethane C Propane D Butane Answer : D Explanation :
59.
 Saccharin is made up of A Toluene B Phenol C Propane D Butane Answer : A Explanation :
60.
 PVC is obtained by the polymerisation of A Propane B Vinyl chloride C Styrene D Acetylene Answer : B Explanation :
61.
 Which of the following vegetable oils does not contain essential fatty acids  ? A Sunflower oil B Mustard oil C Coconut oil D Groundnut oil Answer : A Explanation :
62.
 Which of the following fibres catches fire least  ? A Nylon B Cotton C Rayon D Terri-cot Answer : B Explanation :
63.
 The polymerisation of Which of the following is used in manufacturing of polythene in industry  ? A Methane B Styrene C Acetylene D Ethylene Answer : D Explanation :
64.
 Aspirin is A Methoxy benzoic acid B Methyl Salicylate C Acetyl Salicylic acid D Phenyl salicylate Answer : C Explanation :
65.
 Which of the following is the petroleum wax  ? A Bees wax B Carnauba wax C Paraffin wax D Jojoba wax Answer : C Explanation :
66.
 A polymeric substance used to make parachute is A Rayon B Viscose C Cotton D Terylene Answer : B Explanation :
67.
 ‘Milk Sugar’  is A Lactose B Maltose C Galactose D Sucrose Answer : A Explanation :
68.
 Petroleum is a mixture of A Elements B Hydrocarbons C Polymers D Salts Answer : B Explanation :
69.
 Which one of the following organic compounds has fruity smell  ? A Alcohol B Aldehyde C Ester D Ether Answer : C Explanation :
70.
 Polythene is polymer of A Ethylene B Propylene C Acetylene D Aniline Answer : A Explanation :
71.
 When formaldehyde and potassium hydroxide are heated, we get A Acetylene B Methyl alcohol C Methane D Ethyl formate Answer : B Explanation :
72.
 The polymer used in making plastic crockery is A Decron B Nylon C Bakelite D Melamine Answer : D Explanation :
73.
 Vulcanization of rubber is carried out by adding A Sulphur B Carbon C Ozone D Phosphorus Answer : A Explanation :
74.
 Preparation of  ‘Dalda or Vanaspati’  ghee from vegetable oil utilizes the following process  : A Hydrolysis B Oxidation C Hydrogenation D Ozonolysis Answer : C Explanation :
75.
 Denatured spirit is ethanol mixed with A Petrol B Kerosene C Water D Pyridine Answer : D Explanation :
76.
 The compound to which  H2  does not add is A Biphenyl ethylene B Tetraphenyl ethylene C Tetra – a - naphthyl ethylene D Tetra – 9 - phenanthryl ethylene Answer : B Explanation :
77.
 Candle is a mixture of A Paraffin was and stearic acid B Bees wax and stearic acid C Higher fatty acids and stearic acid D Bees wax and paraffin wax Answer : A Explanation :
78.
 Ethanol containing  5%  water is known as A Rectified spirit B Denatured spirit C Methylated alcohol D Power alcohol Answer : A Explanation :
79.
 Litmus is obtained from A A bacterium B A fungus C An alga D Lichen Answer : D Explanation :
80.
 Vinegar made by fermentation from cane sugar contains A Palmitic acid B Lactic acid C Citric acid D Acetic acid Answer : D Explanation :
81.
 Tetra ethyl lead (TEL)  is A A catalyst in burning fossil fuel B An antioxidant C A reductant D An antiknock compound Answer : D Explanation :
82.
 Cokking gas is a mixture of A Mrthane and ethylene B Carbon dioxide and oxygen C Butane and propane D Carbon monoxide Answer : C Explanation :
83.
 Glycol is added to aviation gasoline because it A Reduces evaporation of petrol B Increases efficiency of petrol C Prevents freezing of petrol D Reduces consumption of petrol Answer : C Explanation :