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1 mark

Assertion (A): The pouring of kerosene oil on stagnant pools helps to eradicate malaria.
Reason (R): The kerosene oil is poisonous for the mosquitoes.

  1. A
    Both A and R are true and R is the correct explanation of A.
  2. B
    Both A and R are true but R is not the correct explanation of A.
  3. C
    A is true but R is false.
  4. D
    A is false but R is true.

Solution & Step-by-step Explanation

Assertion (A) is true because pouring kerosene oil forms a thin film over stagnant water where mosquitoes breed. Reason (R) is false because kerosene is not chemically poisonous to them; instead, the oil layer cuts off the oxygen supply from the air, suffocating and killing the mosquito larvae and pupae.

Practice this question

Try it yourself before checking the explanation above.

Assertion (A): The pouring of kerosene oil on stagnant pools helps to eradicate malaria.
Reason (R): The kerosene oil is poisonous for the mosquitoes.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

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