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 $
