Question

When magnesium burns in Cl2 , it forms magnesium chloride.Which element is reduced?

Answer 1

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♦ As given

• Magnesium is burnt in Chlorine gas

• Product formed is Magnesium Chloride

♦ First we should know about Redox reaction

• Redox reaction :- A Chemical reaction in which there is change in oxidation state of atoms .

>>Here

• Red → Reduction of oxidation state of atom during Chemical reaction.

• Ox → Oxidation of oxidation state of atom during Chemical reaction .

$\underline{\textbf{Note :- }}$ In a Redox reaction reduction and oxidation takes place simentenusly , i.e they always takes place in pair.

♦ Now we will write the chemical equations :-

$\sf{ Mg + Cl_2 \longrightarrow MgCl_2}$

♦ Now by Considering Reduction part :-

→ Here Reduction means Gaining of electron .

$\sf{{Cl_{2}}^0 + 2e^-\longrightarrow {Cl_2}^{-2}}$

♦ So here Chlorine is reduced by gaining $\sf{2e^-}$