A reducing agent is a substance which can.

Accept electrons

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Donate electrons

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Accept protons

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Donate protons

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Solution

The correct option is C Donate electrons
A substance which gets oxidised is a good reducing agent. In the following reaction, magnesium is oxidised (loss of electrons) and chlorine is reduce (gain of electrons). Magnesium is a reducing agent (donating electrons) and chlorine is an oxidising agent (gaining electrons).

$M g + {C l}_{2} \to M g {C l}_{2} (r e d o x r e a c t i o n) H a l f I o n - R e a c t i o n s M g \to {M g}^{+ 2} + {2 e}^{-} (o x i d a t i o n) {C l}_{2} + 2 e^{-} \to {2 C l}^{-} (r e d u c t i o n)$

Hence, answer is B.

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A reducing agent is a substance which can:

A reducing agent is a substance which can donate electrons.

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