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ICSE Class 9 Chemistry Question 13 of 26

Study of the First Element — Hydrogen — Question 15

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15
Question

Question 2(iv)

Assertion (A): In Bosch process, hydrogen and carbon dioxide are formed.

Reason (R): Hydrogen and carbon dioxide are separated by passing through ammoniacal cuprous chloride 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

A is true but R is false.

Explanation — In the second step of Bosch process, water gas is mixed with excess steam and passed over heated ferric oxide, which acts as a catalyst and chromic oxide Cr2O3, which acts as a promoter to produce hydrogen and carbon dioxide.

[CO+H2]water gas+H2Oexcess steam→450°CFe2O3 CO2+2H2+Δ\underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} + \underset{\text{excess steam}}{\text{H}_2\text{O}} \underset{\text{Fe}_2\text{O}_3} {\xrightarrow{450 \degree \text{C}}} \text{ CO}_2 + 2\text{H}_2 + \Delta

Hence assertion (A) is true.

The mixture Hydrogen and carbon dioxide(CO2 + H2) are separated through caustic potash solution, which removes carbon dioxide by reacting with it, leaving hydrogen. Hence reason (R) is false.