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Environmental Chemistry Chemistry - Environmental Chemistry

Rajasthan Board (RBSE) - STD 11 Science - Chemistry (Rajasthan - English Medium). 312 questions in this chapter.

Question types

Environmental Chemistry question types

312 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

312
Questions
6
Question groups
5
Question types
Sample Questions

Environmental Chemistry questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Ozone hole refers to :
  • A
    Hole in ozone layer.
  • ✓
    Reduction in thickness of ozone layer in the stratosphere.
  • C
    Reduction in thickness of ozone layer in the troposphere.
  • D
    Increase in concentration of ozone.

Answer: B.

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Q 2M.C.Q (1 Marks)1 Mark
Which of the following statements is true regarding earth's atmosphere?
  • A
    It gets denser with increase in altitude.
  • ✓
    It gets thinner with increase in altitude.
  • C
    Its thickness is atleast one fourth the radius of the earth.
  • D
    It contains no solid particles.

Answer: B.

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Q 3M.C.Q (1 Marks)1 Mark
Air pollutants causing photochemical oxidant production include :
  • A
    Nitrous oxide, nitric acid fumes, nitric oxide.
  • ✓
    Ozone, peroxyacetyl nitrate, aldehydes.
  • C
    Oxygen, chlorine, fuming nitric acid.
  • D
    Sulphur dioxide.

Answer: B.

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Q 5M.C.Q (1 Marks)1 Mark
Low visibility in cold weather is due to :
  • A
    Formation of fossil fuel.
  • ✓
    Unburnt carbon particles or hydrocarbons suspended in air.
  • C
    Lack of adequate power supply.
  • D
    None of these.

Answer: B.

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Q 6Assertion (A) & Reason (B) MCQ1 Mark
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below :
Assertion $(A)$ : The $\text{pH}$ of acid rain is less than $5.6.$
Reason $(R)$ : Carbon dioxide present in the atmosphere dissolves in rain water and forms carbonic acid.
  • A
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A.$
  • ✓
    Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$.
  • C
    Both $A$ and $R$ are not correct.
  • D
    $A$ is not correct but $R$ is correct.

Answer: B.

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Q 7Assertion (A) & Reason (B) MCQ1 Mark
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below:
Assertion $(A)$ : Carbon dioxide is one of the important greenhouse gases.
Reason $(R)$ : It is largely produced by respiratory function of animals and plants.
  • A
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
  • ✓
    Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A.$
  • C
    Both $A$ and $R$ are not correct.
  • D
    $A$ is not correct but $R$ is correct.

Answer: B.

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Q 8Assertion (A) & Reason (B) MCQ1 Mark
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below:
Assertion $(A)$ : Green house effect was observed in houses used to grow plants and these are made of green glass.
Reason $(R)$ : Green house name has been given because glass houses are made of green glass.
  • A
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
  • B
    Both $A$ and R are correct but $R$ is not the correct explanation of $A.$
  • ✓
    Both $A$ and $R$ are not correct.
  • D
    $A$ is not correct but $R$ is correct.

Answer: C.

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Q 9Assertion (A) & Reason (B) MCQ1 Mark
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below:
Assertion $(A)$ : If $\text{BOD}$ level of water in a reservoir is less than $5$ ppm it is highly polluted.
Reason $(R)$ : High biological oxygen demand means low activity of bacteria in water.
  • A
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A.$
  • B
    Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$.
  • ✓
    Both $A$ and $R$ are not correct.
  • D
    $A$ is not correct but $R$ is correct.

Answer: C.

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Q 10Assertion (A) & Reason (B) MCQ1 Mark
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below:
Assertion $(A)$ : Photochemical smog is oxidising in nature.
Reason $(R)$ : Photochemical smog contains $\text{NO}_2$ and $\text{O}_3$ , which are formed during the sequence of reactions.
  • ✓
    Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
  • B
    Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A.$
  • C
    Both $A$ and $R$ are not correct.
  • D
    $A$ is not correct but $R$ is correct.

Answer: A.

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Q 233 Marks Question3 Marks
For your agricultural field or garden you have developed a compost producing pit. Discuss the process in the light of bad odour, flies and recycling of wastes for a good produce.
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