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 $ .
