Redox Reactions And Electrochemistry Ques 534

Question: Which of the following substances acts as an oxidising as well as a reducing agent [UPSEAT 2004; DCE 2004]

Options:

A) $ Na_2O $

B) $ SnCl_2 $

C) $ Na_2O_2 $

D) $ NaNO_2 $

Show Answer

Answer:

Correct Answer: D

Solution:

$ NaNO_2 $ (Sodium nitrite) act both as oxidising as well as reducing agent because in it $ N $ atom is in +3 oxidation state (intermediate oxidation state)
Oxidising property

$ 2NaNO_2+2KI+2H_2SO_4\xrightarrow{{}},Na_2SO_4+K_2SO_4 $ $ +2NO+2H_2O+I_2 $ Reducing property

$ H_2O_2+NaNO_2\xrightarrow{{}}NaNO_3+H_2O $ .



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