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

Environmental Issues Mock Test-8

Question No:1

Assertion: DDT & Hg undergo biological magnification.
Reason: Hg & DDT are not metabolised & excreted by body of organism,

[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:2

Assertion: Sanitary landfills in also not a good method for disposal of solid waste.
Reason: These landfills causes pollution of underground water resources due to seepage of chemicals.

[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:3

Assertion: Nuclear energy in non-polluting way for generating electricity.
Reason: Nuclear waste is not all dangerous for organism.

[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:4

Assertion: UV rays are highly injurious to living organism.
Reason: DNAs proteins of living organism preferentially absorb UV rays, and its high energy breaks the chemical bonds within these molecules.

[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:5

Assertion: Large area of thinned ozone layer particularly marked over the Antarctic region is known as ozone hole.
Reason: CFCs causes ozone depletion.

[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:6

Assertion: Deforestation may causes desertification.
Reason: It causes, loss of biodiversity, disturb hydrological cycle, causes soil erosion, may lead to desertification, in extreme cases.

[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:7

A renewable exhaustible natural resource is

[A] Coal
[B] Petroleum
[C] Minerals
[D] Forest



Question No:8

dB is a standard abbreviation used for the quantitative expression of

[A] The density of bacteria in a medium
[B] A particular pollutant
[C] The dominant Bacillus in a culture
[D] A certain pesticide



Question No:9

The two gases making highest relative contribution to the greenhouse gases are

[A] CO2and CH4
[B] CH4and NO2
[C] CFCs and N2O
[D] CO2and N2O



Question No:10

“Good ozone” is found in the:

[A] Mesosphere
[B] Troposphere
[C] Stratosphere
[D] Ionosphere



Question No:11

Which one of the following pairs of gases are the major-cause of ‘Green house effect’?

[A] CO2and CO
[B] CFCs and SO2
[C] CO2and N2O
[D] CO2 and O3



Question No:12

Which one of the following expanded forms of the following acronyms is correct?

[A] UNEP— United Nations Environmental Policy
[B] ERA—- Environmental Pollution Agency
[C] IVCN— International Union for Conservation of Nature and Natural Resources
[D] IPCC– International Penal for Climahange



Question No:13

Which one of the following statements is wrong in case Bhopal gas tragedy?

[A] Thousands of human beings died
[B] Radioactive fallout engulfed Bhopal
[C] It took place in the night of December 2/3, 1984
[D] Methyl isocyariate gas leakage took place



Question No:14

Eutrophication is often seen in:

[A] Fresh water lakes
[B] Ocean
[C] Mountains
[D] Deserts



Question No:15

In an area where DDT had been used extensively the population of birds declined significantly because:

[A] Birds stopped laying eggs
[B] Earthworms in the area got eradicated
[C] Cobras were feeding exclusively on birds
[D] Many of the birds eggs laid, did not hatch