In which of the following reaction does hydrogen act as an oxidising agent?

H_{2} + F_{2} \to

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H_{2} + S i C l_{4} \to

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N a + H_{2} \to

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C u O + H_{2} \to

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Solution

The correct option is C $N a + H_{2} \to$
The reaction in which hydrogen accepts the electron or its oxidation number changes from $0 to - 1$ , it acts as an oxidising agent.
(a) ${0 H}_{2} + F_{2} \to + 1 H - 1 F$
(b) ${0 H}_{2} + S i C l_{4} \to S i + 4 + 1 H C l$
(c) $2 N a + {0 H}_{2} \to 2 + 1 N a - 1 H$
(d) $C u O + {0 H}_{2} \to C u + {+ 1 H}_{2} O$

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