JOIN ADRE 2.0 Telegram Group

NCERT - Environmental Issues Questions and Answers of Class 12 Biology | GkSeries

Questions
91 Montreal Protocol aims at
1 Control of CO2 emission
2 Reduction of ozone depleting substances
3 Biodiversity conservation
4 Control of water pollution

Answer: Reduction of ozone depleting substances
92 Treatment of sewage involves:
1 removal of suspended particles
2 allow aerination for bacterial action
3 removal of nitrates and phosphates
4 all of these

Answer: all of these
Advertisement
Article and Schedule Quiz Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

93 Common indicator organism of water pollution is:
1 Entamoeba histolytica
2 Escherichia coli
3 Eichhornia crassipes
4 Lemna paucicostata

Answer: Escherichia coli
94 Which rays strike on earth due to depletion of ozone layer ?
1 Ultraviolet
2 Infrared
3 Visible light
4 Microwaves

Answer: Ultraviolet
95 Main approach for conservation of water is
1 Afforestation
2 Constructing waste water treatment plnts and recycling the treated water
3 by storing rain water and recharge groun water
4 all of these

Answer: all of these
96 BOD is ______ in polluted water and ______ in potable water.
1 more, less
2 less, medium
3 medium, more
4 less, more

Answer: more, less
97 Increase in the concentration of pollutants in higher trophic levels is known as
1 Biomagnification
2 Biodegradation
3 Eutrophication
4 Recycling

Answer: Biomagnification
98 ______ is used to convert organic pollutants into water vapour and CO2.
1 Electrostatic precipitator
2 Flame combustion
3 Absorption
4 Wet-scrubber

Answer: Flame combustion
99 Which method is used to control pollutants of particulate nature ?
1 Combustion
2 Absorption
3 Electrostatic precipitators
4 Oxidation pond

Answer: Electrostatic precipitators
100 Soil pollution can be reduced by
1 biological manures
2 using biofertilizers
3 biological control
4 all of these

Answer: all of these
101 Most abundant water pollutant is
1 Industrial wastes
2 Pesticides
3 Detergents
4 Ammonia

Answer: Industrial wastes
102 Most hazardous metal pollutant of the automobile exhaust is
1 Lead
2 Mercury
3 Cadmium
4 Copper

Answer: Lead
103 Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of :
1 Calmodulin
2 Mg ATPase
3 Ca ATPase
4 None of these

Answer: Calmodulin
104 Most harmful environmental pollutants are
1 Natural nutrients in excess
2 Human organic wastes
3 Nonbiodegradable chemicals
4 Waste animal feed

Answer: Nonbiodegradable chemicals
105 The atmosphere of big metropolitan cities is polluted most by
1 Automobile exhausts
2 Radio-active fall out
3 Household waste
4 Pesticides residue

Answer: Automobile exhausts

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement