What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called
(A) Paint
(B) Glass
(C) Gun Powder
(D) Cement
The chemical used as a fixer in photography is__________
(A) sodium sulphate
(B) borax
(C) sodium thiosulphate
(D) ammonium sulphate
The alcohol used in the preparation of dynamite is________
(A) ethyl alcohol
(B) glycerol
(C) glycol
(D) methyl alcohol