set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following statements, is not correct, about glass?

a) The silicate units in glass are arranged in a way that is quite similar to the arrangement found in liquids.

b) There is no definite melting point for glass.

c) Because of its high viscosity glass exists in solid state

d) Glass is a solid because it has a regular crystalline arrangement.

Question : 2

Which one among the following is the main ingredient in cement?

a) Clay

b) Limestone

c) Gypsum

d) Ash

Question : 3

One of the properties of glass is its transparency. This property of glass is due to

a) irregular arrangement of silicate units in glass.

b) regular arrangement of silicate units in glass.

c) its high viscosity.

d) its high coefficient of thermal expansion.

Question : 4

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 : 5

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 : 6

Soaps are

a) sodium salts of trihydroxy alcohols

b) sodium salts of fatty acids containing carbon atoms 16 to 18

c) sodium salts of sulphuric acids containing carbon atoms 10 to 16

d) none of these