(A) NO2
(B) SO2
(C) NH3
(D) H2S
Ultraviolet radiation striking the earth is due to the depletion of?
(A) Carbon dioxide
(B) Carbon monoxide
(C) Oxygen
(D) Ozone
Photo oxidation process is initiated by?
(A) Heat
(B) Light
(C) Oxygen
(D) Catalyst
Alcohol prepared by the distillation of wood is?
(A) Ethyl alcohol
(B) Methyl alcohol
(C) Propyl alcohol
(D) Glycerol
Wax used for making candle is chemically a mixture of?
(A) Aromatic Hydrocarbons
(B) Aliphatic Hydrocarbons
(C) Cyclic Hydrocarbons
(D) Aliphatic and Aromatic Hydrocarbons
Silver halides are used in photographic plates because they are?
(A) Reduced by light
(B) Totally colourless
(C) Soluble in hypo solution
(D) Oxidized in air
Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful?
(A) Solar infrared radiation
(B) Solar ultraviolet radiation
(C) CO2 in the air
(D) SO2 in the air
Laughing gas is?
(A) Nitrous oxide
(B) Nitric oxide
(C) Nitrogen trioxide
(D) Nitrogen pentoxide