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Which of the following represents redox ...

Which of the following represents redox reaction ?

A

`Cr_(2)O_(7)^(-2) +2OH^(-) rarrCrO_(4)^(2-)+ H_(2)O`

B

`SO_(5)^(2-) +I^(-) rarrI_(2)+SO_(4)^(2-)`

C

`Ca(OH)_(2)+Cl_(2) rarrCa(ClO)_(2)+CaCl_(2)`

D

`PCl_(5) rarrPCl_(3)+Cl_2`

Text Solution

Verified by Experts

The correct Answer is:
B, C
a) `overset(+6)underset(_)Cr_(2)O_7^(2-)+2OH^(-)rarroverset(+6)(CrO_4^(2-))+H_2O`
b) `overset(+8)underset(_)(S)O_5^(2+)+I^(-)rarrI_2^(0)+overset(+6)(S)ulO_4^(2-)`
c) `Ca(OH)_(2)+Cl_(2)^(0) rarr Caoverset(+1)((ClO))_(2)+CaCl_(2)^(-1)`
d) `overset(+5 -1)(PCl_5) rarr overset(+3-1)(PCl_3)+Cl_(2)^(0)`
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