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Free download in PDF Class 11 Chemistry Chapter 14 Environmental Chemistry Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Ozone layer that absorbs sun's ultraviolet radiation is present in _______layer of atmosphere.
[A]
Thermosphere
[B]
Mesosphere
[C]
Stratosphere
[D]
Troposphere
(2)
The BOD value of clean water is
[A]
< 5 ppm
[B]
< 15 ppm
[C]
> 15 ppm
[D]
> 17 ppm
(3)
Choose the factor that is responsible for ozone layer depletion.
[A]
CFCs
[B]
CBrCs
[C]
CH2Br2
[D]
all are correct
(4)
Select the major air pollutant
[A]
CO
[B]
mist
[C]
Hydrogen sulphide
[D]
all
(5)
Methane gas produces by_______ fields.
[A]
Mustard field
[B]
Paddy field
[C]
Wheat field
[D]
Groundnut field
(6)
Choose the compound that always present in photochemical smog.
[A]
O3
[B]
CO
[C]
CO2
[D]
CHO
(7)
Bio-degradable pollutant pair is
[A]
Domestic waste and sewage
[B]
DDT and Mercury salt
[C]
Mercury salt and plastic
[D]
Aluminium foil and DDT
Answer: Domestic waste and sewage
(8)
_______ is the uppermost region of the earth atmosphere.
[A]
Stratosphere
[B]
Troposphere
[C]
Exosphere
[D]
Ionosphere
(9)
BOD5 means
[A]
Waste decomposed in 5 days
[B]
Oxygen consumed in 5 days
[C]
Microorganisms killed after 5 days
[D]
Amount of dissolved oxygen left after after 5 days
Answer: Oxygen consumed in 5 days
(10)
Which is the resulting disease due to depletion of ozone layer.
[A]
Thyroid cancer
[B]
Pulmonary cancer
[C]
Skin cancer
[D]
Breast cancer
(11)
Layer that protects us from harmful U.V rays present in____.
[A]
Troposphere
[B]
Stratosphere
[C]
Mesosphere
[D]
Exosphere
(12)
We can see London smog in
[A]
During day time of summer
[B]
During morning time of summer
[C]
During morning time of winter
[D]
During day time of Winter
Answer: During morning time of winter
(13)
Particulates matter contains _______.
[A]
Chlorobenzene
[B]
Toluene
[C]
Nitrobenzene
[D]
Polycyclic hydrocarbons
Answer: Polycyclic hydrocarbons
(14)
Cause of Stratosphere’s ozone layer depletion
[A]
CF2Cl2
[B]
C6F16
[C]
C6H6F6
[D]
C6Cl6
(15)
Pollutant _________ forms by burning of fossil fuels.
[A]
Nitrogen dioxide
[B]
Nitric acid
[C]
Nitrous oxide
[D]
Sulphur dioxide
(16)
Percentage of CO2 in atmosphere is
[A]
0.0034
[B]
0.034
[C]
34.03
[D]
3.4
(17)
The disease that occurs due to eating high Hg content fish.
[A]
Minimata disease
[B]
Beri-beri disorder
[C]
kwashiorkar disese
[D]
Osteosclerosis
(18)
Summer smog is caused primarily by
[A]
PAN
[B]
CO2
[C]
Ozone
[D]
NO2
(19)
Threat to Agra’s historical monument.
[A]
Hard water of Yamuna river
[B]
Temperature mediated spoilage of marble
[C]
Air pollutants from Mathura refinery
[D]
Weathering of marble
Answer: Air pollutants from Mathura refinery
(20)
Choose the compound that produce toxic effect.
[A]
Carbon dioxide-Hb
[B]
Carbon monoxide-Hb
[C]
Oxygen-Hb
[D]
Carbon suboxide-Hb
Answer: Carbon monoxide-Hb
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