Redox Reactions And Electrochemistry Ques 664

Question: Which of the following represents redox reactions-

I. $ Cr_2O_7^{2-}+2\overline{O}H\xrightarrow{{}}2Cr_4^{2-}+H_2O $ II. $ Zn+CuSO_4\xrightarrow{{}}ZnSO_4+Cu $ III. $ 2MnO_4^{-}+3M{{n}^{2+}}+4\overline{O}H\xrightarrow{{}} $ $ 5MnO_2+2H_2O $ IV. $ 2C{{u}^{+}}\xrightarrow{{}}Cu+C{{u}^{2+}} $

Options:

A) I, II

B) I, III

C) III, IV

D) II, III, IV

Show Answer

Answer:

Correct Answer: D

Solution:

[d] II, III and IV are redox reactions.



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक