D-And F-Block Elements Ques 450
Question: Zn gives $ H_2 $ gas with $ H_2SO_4 $ and $ HCl $ but not with $ HNO_3 $ because
Options:
A) Zn acts as an oxidising agent when react with $ HNO_3 $ .
B) $ HNO_3 $ is weaker acid than $ H_2SO_4 $ and $ HCl $ .
C) In electrochemical series Zn is above hydrogen.
D) $ NO_3^{-} $ ion is reduced in preference to hydroniumion.
Show Answer
Answer:
Correct Answer: D
Solution:
$ NO_3^{-} $ ions are reduced by nascent hydrogen $ Metal+HNO_3\to Metalnitrate+[ H ] $ $ HNO_3+8[H]\to N_2O+5H_2O $
