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
Rotting garbage dumps and by fossil fuels or when vegetation is burnt, paddy fields, coal mines, large amounts of one of the following gases are released.
  • A
    CFC
  • B
    nitrous oxide
  • C
    ethane
  • D
    methane
    Correct
2
Avoiding burning of dry leaves and wood will help in reducing
  • A
    reduce the production of nitrous oxide
  • B
    reduce the production of nitrous oxide
  • C
    global warming
    Correct
  • D
    greenhouse gases
3
Which of the following is a macronutrient?
  • A
    carbon
    Correct
  • B
    boron
  • C
    copper
  • D
    iron
4
Increase in the global temperature increases the incidence of
  • A
    tuberculosis
  • B
    dengue
    Correct
  • C
    AIDS
  • D
    cirrhosis
5
The formation of acid rain can be reduced
  • A
    by reducing the emission of sulphur dioxide and nitrogen dioxide in the atmosphere.
    Correct
  • B
    by increasing the emission of sulphur dioxide and nitrogen dioxide in the atmosphere.
  • C
    by reducing the emission of carbon monoxide and hydrogen peroxide in the atmosphere.
  • D
    by reducing the emission of chlorine and nitrogen dioxide in the atmosphere.
6
Catalytic converters must be used in cars to reduce the to reduce the effect of exhaust fumes on the atmosphere. The converter should contain one of the main components
  • A
    ceramic honeycomb coated with precious metals
    Correct
  • B
    plastic comb coated with Rh
  • C
    plastic comb coated with Pd, Pt
  • D
    ceramic honeycomb coated with nonmetals
7
Requirement of macronutrient per acre of the land is
  • A
    20-200 kg
  • B
    200-400 kg
  • C
    30-400 kg
  • D
    5 to 200 kg
    Correct
8
Three elements needed for the healthy growth of plants are
  • A
    N K C
  • B
    N Ca P
  • C
    N S P
  • D
    N P K
    Correct
9
Which of the following is not a secondary pollutant
  • A
    carbonic acid
  • B
    carbon dioxide
    Correct
  • C
    sulphuric acid
  • D
    ozone
10
Residence time of methane in the atmosphere is
  • A
    2 -3 days
  • B
    3 - 7 days
  • C
    3 - 7 years
    Correct
  • D
    2 - 3 years
11
Major cause of \({\text{S}}{{\text{O}}_{\text{2}}}\) on global scale is
  • A
    electric sparks
  • B
    combustion
  • C
    all
  • D
    volcanoes
    Correct
12
Which of the following is not a condition for the formation of smog?
  • A
    winds
    Correct
  • B
    less movement of air
  • C
    sufficient NO
  • D
    sunlight
13
Incineration of municipal waste is carried out in the temperature range of
  • A
    \({\text{5}}00{\text{ to 9}}00^\circ {\text{C}}\)
  • B
    \({\text{95}}0{\text{ to 13}}00^\circ {\text{C}}\)
  • C
    \({\text{25}}0{\text{ to 5}}00^\circ {\text{C}}\)
  • D
    \({\text{9}}00{\text{ to 1}}000^\circ {\text{C}}\)
    Correct
14
In which of the following layer of atmosphere there is more thickness of ozone layer?
  • A
    mesosphere
  • B
    photosphere
  • C
    stratosphere
    Correct
  • D
    troposphere
15
Which of the following air pollutants is more dangerous for ozone layer?
  • A
    Oxides of nitrogen
  • B
    CFC
    Correct
  • C
    CO
  • D
    \({\text{C}}{{\text{O}}_{\text{2}}}\)