some important man made materials - Category wise Question and Answer Practice Test with Solutions

Question : 11

Flint glass is obtained from which of the following ?

a) Sodium aluminum borosilicate

b) Sand, red lead and potassium carbonate

c) Zinc and barium borosilicate

d) Pure silica and zinc oxide

Question : 12

Night-blindness is caused due to the deficiency of

a) Vitamin C

b) Vitamin A

c) Vitamin D

d) Vitamin B

Question : 13

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

a) Condensed gas

b) Super cooled liquid

c) Crystalline solid

d) Liquid crystal

Question : 14

Washing soaps are potassium and sodium salts of

a) mineral acids

b) fatty acids

c) dicarboxylic acids

d) None of these

Question : 15

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