set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The reaction that takes place in soap making is called saponification. Basically soap is sodium or potassium salts of

a) long chain dicarboxylic acids

b) glycerol

c) long chain monocarboxylic acids

d) long chain tricarboxylic acids

Question : 2

Which of the following statements about vitamin B12 is incorrect?

a) It is also present in rain water

b) It occurs in plants

c) It has a cobalt atom

d) It is needed for human body in very small amounts

Question : 3

Glass is a transparent substance obtained by heating silica with oxides or carbonates of metals. Glass is a mixture of

a) oxides

b) sulphates

c) phosphates

d) silicates

Question : 4

What is the composition of nitrolim – a chemical fertilizer ?

a) Calcium carbide and carbon

b) Calcium carbide and nitrogen

c) Nitrogen and limestone

d) None of these

Question : 5

Washing soaps are potassium and sodium salts of

a) mineral acids

b) fatty acids

c) dicarboxylic acids

d) None of these

Question : 6

Which one of the following correctly defines the state of glass?

a) Condensed gas

b) Super cooled liquid

c) Crystalline solid

d) Liquid crystal