D-And F-Block Elements Ques 220

Question: Zn gives hydrogen gas with $ H_2SO_4 $ and $ HCl $ but not with $ HNO_3 $ because

[CBSE PMT 2002]

Options:

A) $ NO_2 $ is reduced in preference to $ H_3{{O}^{+}} $

B) $ HNO_3 $ is weaker acid than $ H_2SO_4 $ and $ HCl $

C) $ Zn $ acts as oxidising agent when reacts with $ HNO_3 $

D) In electrochemical series $ Zn $ is placed above the hydrogen

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Answer:

Correct Answer: B

Solution:

$ 4Zn+10HNO_3\to 4Z{{(NO_3)}_2}+NH_4NO_3+3H_2O $



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