D-And F-Block Elements Ques 173

Question: Reaction between the following pairs will produce $ H_2 $ except

[CPMT 1973; CBSE PMT 1998]

Options:

A) $ Na+ $ ethyl alcohol

B) $ Fe+ $ steam

C) $ Fe+H_2SO_4 $ (aq.)

D) $ Cu+HCl $ (aq.)

Show Answer

Answer:

Correct Answer: D

Solution:

$ Cu+HCl\to $ no reaction Copper is less reactive than hydrogen. Therefore it is unable to displace hydrogen from acid. $ E_{Cu}^{0}=+0.34 $ and $ E_{H}^{0}=0.00 $



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