Redox Reactions And Electrochemistry Ques 538

Question: The number of electrons involved in the reduction of $ Cr_2O_7^{2-} $ in acidic solution to $ C{{r}^{3+}} $ is [EAMCET 1983]

Options:

A) 0

B) 2

C) 3

D) 5

Show Answer

Answer:

Correct Answer: C

Solution:

$ Cr_2O_7^{2-}+3{{e}^{-}}\to C{{r}^{3+}} $ . In this reaction three electrons are required for the reduction of $ Cr_2O_7^{2-} $ into $ C{{r}^{3+}} $ .



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