What type of reactions are represented by the following equations? (i) CaCO 3 → CaO + CO 2 (ii) CaO + H 2 O → Ca ( OH ) 2 (iii) 2 FeSO 4 → Fe 2 O 3 + SO 2 + SO 3 (iv) NH 4 Cl → NH 3 + HCl (v) 2 Ca + O 2 → 2 CaO

(i) CaCO 3 → CaO + CO 2 . This equation represents decomposition reaction. (ii) CaO + H 2 O → Ca ( OH ) 2 . This equation represents combination reaction. (iii) 2 FeSO 4 → Fe 2 O 3 + SO 2 + SO 3 . This equation represents decomposition reaction. (iv) NH 4 Cl → NH 3 + HCl . This equation represents decomposition reaction. (v) 2 Ca + O 2 → 2 CaO . This equation represents combination reaction.

E M B I B E

Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Very Short Answer Type Questions>Q 13

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10th CBSE

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Write one equation each for the decomposition reactions where energy is supplied in the form of (a) heat, (b) light, and (c) electricity.

Important Questions on Chemical Reactions and Equations

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10th CBSE

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Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Very Short Answer Type Questions>Q 14

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the chemical equation of the reaction involved.