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Give the chemical equations for the following reactions :(a) Thermit reaction(b) Burning of magnesium in air(c) Iron nail/dust is dropped in aqueous solution of copper sulphate.

Q.3 (viii) Give the chemical equations for the following reactions :
(a) Thermit reaction
(b) Burning of magnesium in air
(c) Iron nail/dust is dropped in aqueous solution of copper sulphate.

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Answer:

(a) Thermit reaction — aluminium reduces iron oxide; a huge amount of heat is produced and the iron formed is molten:

\[\mathrm{Fe_2O_3 + 2Al \rightarrow 2Fe + Al_2O_3 + heat}\]

(b) Magnesium burns in air with a dazzling white flame to form magnesium oxide:

\[\mathrm{2Mg + O_2 \rightarrow 2MgO}\]

(c) Iron displaces copper from copper sulphate solution:

\[\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\]

Doubtly AI · 25 Oct 2026 AI-verified · Oct 2026 Report
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