Title 14. ENVIRONMENTAL CHEMISTRY.pdf ✅

PAPER 1 (1.) Pollution is[NCERT Exemplar, Page: 406] (1) removal of top soil (2) release of toxic/undesirable materials in environment (3) conservation of energy (4) All of the above (2.) SO2 gas is poisonous to [NCERT Exemplar, Page: 407] (1) Animals (2) Plants (3) Both(a) and (b) (4) Neither (a) nor (b) (3.) Petroleum resource is[NCERT Exemplar, Page: 411] (1) renewable (2) non-renewable (3) synthetic and biodegradable (4) infinite and unconventional (4.) Which will not cause any atmospheric pollution?[NCERT Exemplar, Page: 407] (1) Hydrogen (2) SO2 (3) CO2 (4) CO (5.) Biosphere refers to[NCERT Exemplar, Page: 406] (1) plants of the world (2) special plants (3) area occupied by living beings (4) plants of a particular area (6.) When biosphere turns into human-dominated environment it is called[NCERT Exemplar, Page: 406] (1) Noosphere. (2) Troposphere. (3) Mesosphere. (4) Manosphere. (7.) Gas released during Bhopal Gas Tragedy was[QR code, Page: 406] (1) methyl isocyanate (2) potassium isothiocyanate (3) sodium isothiocyanate (4) ethyl isothiocyanate Practice Questions Framed from NCERT Text (8.) Which one of the following is not a common component of photochemical smog?[NEET-2014, NCERT Exemplar, Page: 412] (1) Ozone (2) Acrolein (3) Peroxyacetyl nitrate (4) Chlorofluorocarbons (9.) Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?[NCERT Exemplar, Page: 413] (1) Polyhalogens (2) Ferrocene (3) Fullerenes (4) Freons

(19.) The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended up to 10 km from sea level. This layer is[NCERT Exemplar, Page: 407] (1) Stratosphere (2) Troposphere (3) Mesosphere (4) Hydrosphere (20.) Which of the following statements about photochemical smog is wrong?[QR code, NCERT Exemplar, Page: 412] (1) It has high concentration of oxidising agents. (2) It has low concentration of oxidising agents. (3) It can be controlled by controlling the release of NO2, hydrocarbons, ozone, etc. (4) Plantation of some plants like Pinus helps in controlling the photochemical smog. (21.) Dinitrogen and dioxygen are the main constituents of air but these do not react with each other to form oxides of nitrogen because[NCERT Exemplar, Page: 407] (1) the reaction is endothermic and require very high temperature. (2) the reaction can be initiated only in presence of catalyst. (3) oxides of nitrogen are unstable. (4) N2 and O2 are unreactive. (22.) The pollutions that come directly in the air from sources are called primary pollutions. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary pollutants?[NCERT Exemplar, Page: 412] (1) CO (2) Hydrocarbon (3) Peroxyacetyl nitrate (4) NO (23.) Which one of the following statements regarding photochemical smog is not correct?[NCERT Exemplar, Page: 412] (1) Carbon monoxide does not play any role in photochemical smog formation. (2) Photochemical smog is an oxidising agent in character. (3) Photochemical smog is formed through photochemical reaction involving solar energy. (4) Photochemical smog does not cause irritation in eyes and throat. (24.) The uppermost region of the atmosphere is called[NCERT Exemplar, Page: 407] (1) Ionosphere (2) Stratosphere (3) Troposphere (4) Exosphere (25.) The region that is greatly affected by air pollution is[NCERT Exemplar, Page: 407] (1) Thermosphere (2) Stratosphere (3) Troposphere (4) Mesosphere (26.) The quantity of CO2 in atmosphere is [QR code, NCERT Exemplar, Page: 408] (1) 3.34% (2) 6.5% (3) 0.034% (4) 0.34%