set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

CNG used in automobiles to check pollution mainly consists of

a) N₂

b) CH₄

c) CO₃

d) H₂

Question : 2

The Pressure gauge is not given in the domestic LPG cylinders because

a) Their use is not safe

b) They are so costly

c) They cannot represent the quantity of gas in LPG cylinders

d) They are choked by LPGs

Question : 3

Consider the following statements. Sodium silicate and sodium sulphate are mixed as detergents in washing powders so that

1. To maintain dryness of the powder.
2. To maintain the basicity of powder.

a) Only 2

b) Both 1 and 2

c) Only 1

d) None of these

Question : 4

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 : 5

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 : 6

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