NEET Botany Environmental Issues sample,model,mock,MCQs,PDFs

Environmental Issues Mock Test-7

Question No:1

Which of these statements is/are true about slash and burn agriculture?

[A] Farmers cut down trees of the forest and burn the plant remains.
[B] Ash is used as fertilizer.
[C] Land is used for farming or cattle grazing.
[D] All of the above



Question No:2

Deforestation causes all of these except:

[A] Soil erosion and loss of biodiversity
[B] Desertification
[C] Increase CO2, cone, in atmosphere
[D] Undisturbed hydrological cycle



Question No:3

Which of these statements is/are true about reforestation?

[A] It is process of restoring forest.
[B] It may occur naturally,
[C] It can be sped up by planting trees.
[D] All of the above



Question No:4

Soil erosion occurs because of:

[A] Over-cultivation
[B] Unrestricted grazing
[C] Deforestation and poor irrigation practice
[D] All of the above



Question No:5

Problems which came with Green Revolution are:

[A] Water logging
[B] Increased soil salinity
[C] Both (a) and (b)
[D] None of these



Question No:6

Irrigation without proper drainage leads to:

[A] Decrease soil salinity
[B] Water logging
[C] Increased yield of crop
[D] Increased aeration in soil



Question No:7

Desertification is a major problem nowadays, mainly due to:

[A] Overgrazing
[B] Over-cultivation
[C] Increased urbanization
[D] Water logging



Question No:8

Match the columns.
Column-I— Column-II
A. DU 1)Dobson unit
B. CFCs 2)Chlorofluoro carbons
C. BOD 3)Biological oxygen demand
D. PIL 4)Public Interest Litigation
E. CNG 5) Compressed natural gas

[A] A:1, B:3, C:2, D:4, E:5
[B] A:4, B:3, C:2, D:1, E:5
[C] A:1, B:2, C:3, D:4, E:5
[D] A:1, B:2, C:4, D:3, E:5



Question No:9

Select the incorrect match.

[A] El Nino effect—odd climatic changes
[B] Radioactive leakage—Three Mile Island
[C] Bio magnification—Hg and DDT
[D] Haryana Kisan Welfare Club—Ahmed Khan



Question No:10

Which among these is the most common source of pollution of water bodies?

[A] Waste from thermal power plant
[B] Effluents from chemical factories
[C] Hospital waste
[D] Domestic sewage



Question No:11

Air pollution primarily result from:

[A] Deforestation
[B] Forestation
[C] Burning of fossil fuel
[D] Eutrophication



Question No:12

Assertion: Noise is undesirable high level of sound.
Reason: Noise causes psychological and physiological disorder in humans.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:13

Assertion: CNG is better fuel than dieses.
Reason: CNG burns most efficiently and cheaper than petrol.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:14

Assertion: Presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae, called algal bloom.
Reason: Algal bloom imparts a distinct colour to the water bodies.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:15

Assertion: Water hyacinth is an aquatic weed.
Reason: They grow abundantly in eutrophic water bodies.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false