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

Question : 11 [IAS (Pre) 2016]

Why does the Government of India promote the use of ‘Neem-coated Urea’ in agriculture?

a) Nitrous oxide, which is a greenhouse gas, is not at all released into atmosphere by crop fields

b) Release of Neem oil in the soil increases nitrogen fixation by the soil micro-organisms

c) Neem coating slows down the rate of dissolution of urea in the soil

d) It is a combination of a weedicide and a fertilizer for particular crops

Question : 12 [RAS/RTS (Pre) 2008]

Which one of the following acids, is formed during the change of milk into curd?

a) Ascorbic acid

b) Citric acid

c) Acetic acid

d) Lactic acid

Question : 13 [UPPCS (Mains) 2008]

What percentage of phosphorus (P2 S5 ) and Nitrogen (N) is present in DAP?

a) 30% N and 46% $P_2O_5$

b) 10% N and 20% $P_2O_5$

c) 18% N and 46% $P_2O_5$

d) 35% N and 70% $P_2O_5$

Question : 14 [UPPCS (Pre) 2016]

Which one of the following gases, released from biogas plant is used as a fuel gas?

a) Methane

b) Butane

c) Propane

d) Ethane

Question : 15 [IAS (Pre) 2011]

Aspartame is an artificial sweetner sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low calorie sweetening agent in food items. What is the basis of this use?

a) When aspartame is used in food processing, the sweet taste remains, but it becomes resistant to oxidation

b) Aspartame is as sweet as sugar but after ingestion into the body, it is converted into metabolites that yield no calories

c) Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in the human body due to lack of requisite enzymes

d) Aspartame is several times sweeter than table sugar, hence food items made with small quantities of aspartame yield fewer calories on oxidation