Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Which one ofthe following pairs of substances on reaction will not evolve 
gas?
A
Copper and HC1 (aqueous)
B
Iron and steam
C
Iron and 
(aqueous) ( d ) Sodium and ethyl alcohol ( 1998 )
(aqueous) ( d ) Sodium and ethyl alcohol ( 1998 )
Text Solution
Verified by ExpertsThe correct answer is:
A
: Copper is a noble metal, as it lies below hydrogen in the electrochemical series. Therefore, it cannot displace hydrogen from dilute HC1. While iron and sodium lie above hydrogen in the electrochemical series, so they can liberate 
either from steam or 
solution.
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