Environmental Chemistry CBSE Questions & Answers

Environmental Chemistry

This is Chemistry Class 11 Environmental Chemistry CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Chemical species present in the environment are either naturally occurring or generated by human activities. Their interrelation with the surroundings is called:
  • A
    environmental chemistry
    Correct
  • B
    environmental pollution
  • C
    environmental chemical interactions
  • D
    environmental studies
2
Effect of undesirable changes in the surrounding that have harmful effects on plants, animals and human beings is termed as
  • A
    environmental chemistry
  • B
    environmental studies
  • C
    environmental biology
  • D
    environmental pollution
    Correct
3
Dichlorodiphenyltrichloroethane (DDT), plastic materials, heavy metals etc. belong to one of the following options. Choose the most appropriate.
  • A
    nondegradable by natural processes
    Correct
  • B
    nondegradable
  • C
    degradable
  • D
    slowly degradable
4
Some pollutants breakdown by natural processes. Example is
  • A
    vegetable
    Correct
  • B
    majority of chemicals
  • C
    nuclear waste
  • D
    refrigerant materials
5
Tropospheric and stratospheric pollution are actually components of
  • A
    atmospheric pollution
    Correct
  • B
    environmental pollution
  • C
    water pollution
  • D
    soil pollution
6
Stratosphere is a region of the atmosphere which contains
  • A
    plants
  • B
    much water vapour and clouds
  • C
    air
  • D
    Ozone layer
    Correct
7
Troposphere is a region of the atmosphere which contains
  • A
    little water vapour
  • B
    ozone layer
  • C
    dinitrogen, dioxygen,
  • D
    human beings
    Correct
8
Tropospheric pollution is basically due to
  • A
    region of less air movement and cloud formation.
  • B
    it is 10 km from sea level.
  • C
    dinitrogen, dioxygen
  • D
    various oxides of sulphur, nitrogen, carbon, halogens
    Correct
9
Acid rain is
  • A
    organic wastes come down to the earth
  • B
    water polluted by toxic heavy metal residues come down to the earth
  • C
    The gaseous pollutants come down to the earth
    Correct
  • D
    much water vapour
10
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of
  • A
    Decrease in the amount of dissolved oxygen in water.
    Correct
  • B
    Increase in the amount of dissolved oxygen.
  • C
    becomeClogging of gills by mud.
  • D
    Large number of mosquitoes.
11
Nitrogen dioxide causes:
  • A
    ageing
  • B
    Skin itching
  • C
    results in tears and redness
  • D
    acute respiratory disease
    Correct
12
Hydrocarbons are formed
  • A
    complete combustion of carbon
  • B
    incomplete combustion of fuel used in automobiles
    Correct
  • C
    complete combustion of fossil fuel
  • D
    combustion of fuel in automobiles, at high temperatures
13
Carbon monoxide is one of the most serious air pollutants is produced as a result of
  • A
    complete combustion of fuel used in automobiles
  • B
    combustion of fuel in automobiles, at high temperatures
  • C
    complete combustion of fossil fuel
  • D
    incomplete combustion of carbon, firewood, petrol
    Correct
14
carbon monoxide is poisonous to human beings because of
  • A
    results in tears and redness
  • B
    they cause cancer
  • C
    it binds to hemoglobin and eventually produces oxygen deficiency
    Correct
  • D
    acute respiratory disease
15
Inadequate pollution control equipments results in the
  • A
    release of greater amount of carbon monoxide
    Correct
  • B
    release of greater amount of nitric oxide
  • C
    release of greater amount of sulphurdioxide
  • D
    release of greater amount of nitogendioxide