PYQSide ExamsMy practice

Environmental Issues · Question 16

NEET 2018MCQEasy📈 Topic in 12% papers+4−1
1

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

  1. Carbon
  2. Cl
  3. Fe
  4. Oxygen

Answer

(2) Cl

Solution

As per NCERT, UV rays act on CFCs in the stratosphere and release Cl atoms.

Cl atoms degrade ozone and release molecular oxygen; they are not consumed in the reaction and act merely as catalysts:

Cl + O3 ClO + O2

ClO + O Cl + O2

∴ Cl acts as the catalyst.

Answer: (2)

Out of syllabusNEET 2018

Keep practising — Environmental Issues

2

Which of the following is a secondary pollutant?

  1. CO
  2. CO2
  3. SO2
  4. O3
Out of syllabusNEET 2018
3

World Ozone Day is celebrated on

  1. 5th June
  2. 21st April
  3. 16th September
  4. 22nd April
Out of syllabusNEET 2018
4

Match the items given in column I with those in column II and select the correct option given below.

  1. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
  2. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
  3. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  4. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
Out of syllabusNEET 2018
5

Which one of the following statements is not valid for aerosols ?

  1. They alter rainfall and monsoon patterns
  2. They have negative impact on agricultural land
  3. They cause increased agricultural productivity
  4. They are harmful to human health
Out of syllabusNEET 2017
6

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called -

  1. Shifting agriculture
  2. Strip farming
  3. Ley farming
  4. Contour farming
Out of syllabusNEET 2016 (Phase 1)
7

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

  1. Methane
  2. Ozone
  3. Nitrous oxide
  4. Ammonia
Out of syllabusNEET 2016 (Phase 1)
8

Joint Forest Management Concept was introduced in India during :

  1. 1990s
  2. 1970s
  3. 1960s
  4. 1980s
Out of syllabusNEET 2016 (Phase 1)
9

A river with an inflow of domestic sewage rich in organic waste may result in -

  1. Death of fish due to lack of oxygen
  2. Increased population of aquatic food web organisms
  3. Drying of the river very soon due to algal bloom
  4. An increased production of fish due to biodegradable nutrients
Out of syllabusNEET 2016 (Phase 1)
10

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

  1. petroleum industry
  2. sugar industry
  3. domestic sewage
  4. dairy industry
Out of syllabusNEET 2016 (Phase 2)
11

A lake which is rich in organic waste may result in

  1. mortality of fish due to lack of oxygen
  2. increased population of fish due to lots of nutrients
  3. increased population of aquatic organisms due to minerals
  4. drying of the lake due to algal bloom
Out of syllabusNEET 2016 (Phase 2)

All Environmental Issues PYQs →

PDFDownload Environmental Issues PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)