fuel, food preservation, nutrition, medicine, detergents and fertilizers - Category wise Question and Answer Practice Test with Solutions

Question : 21 [PSC (Pre) 2019]

Which one of the following forms an irreversible complex with a haemoglobin of the blood?

a) Pure Nitrogen gas

b) Carbon Monoxide

c) Carbon Dioxide

d) A mixture of Carbon Dioxide and Helium

Question : 22 [IAS (Pre) 2002]

Assertion (A):
Synthetic detergents can make more lather in hard water.
Reason (R):
Synthetic detergents form soluble calcium and magnesium salts with hard water.
Code

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 23 [PSC (Pre) 2015]

Gasohol is

a) Any gas dissolved in alcohol

b) Ethyl alcohol + Petrol

c) Natural gas + Ethyl alcohol

d) Ethyl alcohol + Kerosene oil

Question : 24 [UPPCS (Pre) 2017]

The stench due to leakage from LPG cylinder is because of

a) Butane

b) Methane

c) Propane

d) Ethyl mercaptan

Question : 25 [PSC (Pre) 2019]

Charcoal which is used in decolouring raw sugar is

a) Sugar charcoal

b) Animal charcoal

c) Wood charcoal

d) Coconut charcoal