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Q.

Which of the following reactions involve oxidation and reduction?

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a

$NaBr + HCl ⟶ NaCl + HBr$

b

$HBr + {AgNO}_{3} ⟶ AgBr + {HNO}_{3}$

c

${Na}_{2} O + H_{2} {SO}_{4} ⟶ {Na}_{2} {SO}_{4} + H_{2} O$

d

$H_{2} + {Br}_{2} ⟶ 2 HBr$

answer is C.

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Detailed Solution

Since the given reaction is a redox reaction it involves both oxidation and reduction.

$H_{2} + {Br}_{2} ⟶ 2 HBr$

Question Image

In hydrogen atom the oxidation state is increasing from 0 to +1 while the oxidation state is decreasing from 0 to -1. Hence correct option is C

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