A. 1-2
B. 5-10
C. 150-300
D. 2000-3000
A. Allows visible solar radiation (ultraviolet) of short wave-length to pass through
B. Reflects and absorbs the longer wavelength (infra-red) radiations
C. Prevents solar heat being radiated out completely, resulting in ‘heat trap’ i.e., global warming
D. All A., B. and C.
A. Thermal power plant
B. Petroleum refinery
C. Nitric acid plant
D. Sulphuric acid plant
A. Of clotting of blood
B. Of jamming of respiratory tract
C. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it
incapable of absorbing oxygen
D. It forms CO2 by combining with oxygen present in the blood
A. Mercury
B. Arsenic
C. Aluminium
D. Lead
A. Carbonates
B. Bi-carbonates
C. Iron & manganese
D. Arsenic
A. Roentgen
B. Decibel
C. Hertz
D. None of these