161. Which among the following compounds has the strongest hydrogen bond?

1. HI
2. HCl
3. HF
4. HBr

Option “C” is correct
HF compounds has the strongest hydrogen bond.
162. Ozone hole is caused by chemicals like _____.

1. Nitrogen Oxide
2. Hydrogen Sulphide
3. Chloro Fluoro Carbon
4. Carbon Monoxide

Option “C” is correct
The chief ozone-depleting substances include chlorofluorocarbons (CFCs), carbon tetrachloride, hydrochlorofluorocarbons (HCFCs) and methyl chloroform.
163. Activated Charcoal is used to remove colouring matter from pure substances by_______.

1. Bleaching
2. Oxidation
3. Adsorption
4. Reduction

Option “C” is correct
Activated Charcoal is used to remove colouring matter from pure substances by adsorption.
164. Chernobyl disaster is the result of pollution by_____________.

1. Oil spill
2. Acid rain
3. Carbon dioxide
4. Radioactive waste

Option “D” is correct
Chernobyl disaster is the result of pollution by radioactive wastes. Which occurred on 26 April 1986 in Ukranian Soviet Socialist Republic which was part of Soviet Union.
165. Who had indirect role in the discovery of the atom bomb?

1. Madam Curie
2. Pierre Curie
3. Otto Hahn
4. Albert Einstein

Option “D” is correct
Einstein’s greatest role in the invention of the atomic bomb was signing a letter to President Franklin Roosevelt urging that the bomb be built. The physicist Albert Einstein did not directly participate in the invention of the atomic bomb, he was instrumental in facilitating its development.
166. Major gaseous pollutant of the thermal power station is –

1. HSO3
2. NH3
3. NO2
4. SO2

Option “D” is correct
Major gaseous pollutant of the thermal power station is SO2.
167. A substance which readily forms colloidal solution in contact with water is called –

1. Extrinsic colloid
2. Associated colloid
3. Hydrophobic colloid
4. Hydrophilic colloid

Option “D” is correct
The meaning of the word hydrophilic is water loving. Thus, a substance which readily forms colloidal solution in contact with water is called hydrophilic colloid.
168. Actinides are the elements with atomic numbers from-

1. 89 to 103
2. 101 to 115
3. 97 to 104
4. 36 from 43

Option “A” is correct
The Actinide series contains elements with atomic numbers 89 to 103 and is the sixth group in the periodic table.
169. Who invented Neon Lamp?

1. Vint Cerf
2. David Chaum
3. Georges Claude
4. Josephine Cochrane

Option “C” is correct
Georges Claude invented Neon Lamp.
170. Which of the following is the main end product of carbohydrate digestion?

1. Fats
2. Lipids
3. Glucose
4. Cellulose

Option “C” is correct
End products of digestion of carbohydrates are Glucose, fructose and galactose.
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127 thoughts on “Chemistry”

  6. Dolly

    I Love chemical…it’s my favourite subject..mere iss mein se hmesha hi boht ache marks aate hai….and my interest is also in chemistry…

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