(A) Fuel combustion
(B) Industrial process
(C) Transportation
(D) Solid Waste disposal
In its reaction with silver nitrate, shows?
(A) Basic property
(B) Acidic property
(C) Reducing property
(D) Oxidising property
Earth atmosphere is an envelope of gases extending to a height of?
(A) 100 Km
(B) 150 Km
(C) 200 Km
(D) 300 Km
Which of the following is caused by higher concentration of Phosphorous and Nitrogen?
(A) Hardness
(B) Alkalinity
(C) Acidity
(D) Eutrophication
The manufacture of iron from iron ore involves the process of?
(A) Fractional distillation
(B) Oxidation
(C) Reduction
(D) Electrolysis
Chloroform can be used as?
(A) Antimalarial
(B) Antibiotic
(C) Anaesthetic
(D) Analgesic
An element that does not occur in nature but can be produced artificially is?
(A) Radium
(B) Thorium
(C) Plutonium
(D) Uranium
‘Greenhouse effect’ is produced due to the presence of excess amount of?
(A) Nitrogen dioxide
(B) Sulphur dioxide
(C) Methane
(D) Carbon Monoxide