A single chlorine free radical can destroy how many ozone molecules ?
(A) 10
(B) 100
(C) 10000
(D) 100000
Which of the following factors help to measure quallity of water ?
(A) DO
(B) BOD
(C) COD
(D) all of the above
Which of the following gases is the main cause of acid rain ?
(A) CO
(B) NO2
(C) both a & b
(D) none of the above
The yellow colour in photochemical smog is due to presence of__________________?
(A) dinitrogen oxide
(B) nitrogen dioxide
(C) chlorine gas
(D) chlorine dioxide
Major cause of SO2 on global scale is__________________?
(A) volcanoes
(B) electric sparks
(C) combustion
(D) all
Solubility of KCIO3 gives__________________?
(A) continuous and falling solubility curve
(B) discontinuous and falling solubility curve
(C) continuous and rising solubility curve
(D) discontinuous and rising solubility curve
Mixtures which distill over without change in composition called___________________?
(A) zeotropic mixture
(B) azeotropic mixture
(C) amphoteric mixture
(D) ideal solution
The relative lowering of vapour pressure is_____________________?
(A) equal to the mole fraction of solvent
(B) equal to the mole fraction of solute
(C) directly proportional to the mole fraction of solute
(D) both B & C
In partially miscible liquids the two layers are___________________?
(A) saturated solutions of each liquid
(B) unsaturated solutions of each liquid
(C) normal solution of each liquid
(D) no layer formation takes place