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ICSE Class 9 Chemistry Question 14 of 26

Study of the First Element — Hydrogen — Question 18

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18
Question

Question 2(vii)

Assertion (A): Both dilute sulphuric acid and dilute hydrochloric acid displace hydrogen when they react with metals above hydrogen in the activity series.

Reason (R): The more reactive element displaces the less reactive element from its salt solution.

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

Both A and R are true and R is the correct explanation of A.

Explanation — Metals which are more reactive than hydrogen, when reacted with both dilute sulphuric acid and dilute hydrochloric acid displace hydrogen. The extent to which these reaction occur for a given metal is also based on the activity series of metal where the more reactive element displaces the less reactive element from its salt solution. Hence both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).