(A) Multiple internal reflections
(B) Multiple surface reflections
(C) Highest refraction
(D) 100% transmission
Acid rain destroys vegetations because it contains?
(A) Sulphuric acid
(B) Carbon monoxide
(C) Nitric acid
(D) Ozone
Iodized salt is beneficial for?
(A) Salivary glands
(B) Lowering of blood pressure
(C) Prevention of dehydration
(D) Thyroid function
Scattering of light takes place in?
(A) Solution of electrolyte
(B) Colloidal solution
(C) Electrolysis
(D) Electroplating
Sour taste of Coca Cola is due to the presence of?
(A) Hydrochloric acid
(B) Phosphoric acid
(C) Acetic acid
(D) Formic acid
Type metal used in printing press is an alloy of?
(A) Lead and Zinc
(B) Lead and Bismuth
(C) Lead and Antimony
(D) Lead and Copper
Impure camphor is purified by?
(A) Fractional distillation
(B) Fractional crystallization
(C) Sublimation
(D) Steam distillation
Aluminium can be purified from?
(A) Distillation
(B) Oxidation
(C) Ozonolysis
(D) Electrolysis