Chemistry
Grade-8
Easy
Question
In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because:
(i). Insoluble calcium sulfate formed during this reaction
(ii). Calcium sulfate covers the marble chips and stops the reaction.
(iii). The reaction is a highly exothermic reaction
(iv). To react both of the reactants, many temperature conditions need to be fulfilled
- Only (i) and (ii)
- Only (i) and (iii)
- Only (ii) and (iv)
- Only (i) and (iv)
Hint:
Reaction of carbon monoxide with acids.
The correct answer is: Only (i) and (ii)
In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because (i) insoluble calcium sulfate formed during this reaction & (ii) calcium sulfate covers the marble chips and stops the reaction.
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