Which of the following has highest concentration of PAN?
Smoke
Ozone
Photochemical smog
Reducing smog
Living in the atmosphere of CO is dangerous, because it
combines with O, present inside to form CO2
reduces organic matter of tissues
combines with haemoglobin and makes it incapable to absorb oxygen
dries up the blood.
Which of the following is not a green house gas?
Hydrogen
Carbon dioxide
Methane
Nitrous oxide or N2O
Green chemistry means such reactions which
are related to the depletion of ozone layer
study the reactions in plants
produce colour during reactions
reduce the use and production of hazardous chemicals.
The radiant energy from the sun is due to :
combustion
chemical reaction
nuclear fusion
nuclear fission
Which of the following chemicals are used to manufacture methyl isocyanate that caused "Bhopal Tragedy"?
(i) methylamine
(ii) phosgene
(iii) phosphine
(iv) dimethylamine
(i) and (iii)
(iii) and (iv)
(i) and (ii)
(ii) and (iv)
Ozone in stratosphere is depleted by
CF2Cl2
C7F16
C6H6Cl6
C6F6
A.
CF2Cl2
Ozone depletion is caused by a number of pollutants like chlorofluorocarbons (14% of total depiction), nitrogen oxides. sulphur oxides, CCl4, Cl2 etc. Maximum ozone depleting potential or OPD is of chlorofluorocarbons (CF2Cl2) due to release of chlorine by it. A single chlorine atom converts 1 lakh molecules of ozone to oxygen.