Redox Reactions And Electrochemistry Ques 770
Question: Which of the following acts as an oxidizing as well as reducing agent-
Options:
A) $ Na_2O $
B) $ Na_2O_2 $
C) $ NaNO_3 $
D) $ NaNO_2 $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ NaNO_2, $ is the only compound among the given options which can acts as an oxidizing as well as reducing agent due to the reason that in $ NaNO_2, $ N is in its intermediate oxidation state +3.
It oxidises K.I to $ I_2 $ as follows:
$ 2NaNO_2+2KI+4CH_3COOH\xrightarrow[{}]{{}} $
$ 2NO+I_2+2CH_3COOK+2CH_3COONa+2H_2O $ Similarly, it reduces $ H_2O_2 $ to $ H_2O $
$ NaNO_2+H_2O_2\xrightarrow[{}]{{}}NaNO_3+H_2O $
