(i) Give an examplefor an a combination reactionwhich is exothermic . (ii) Identify the oxidising agen, reducing agent in the following reaction : H_(2)S+Clrarr2HCl+S (iii) Name the phenomenon due to which the taste and smell of oily food changes when kept for a long time in open. Suggest one method to prevent it.

(i) Give an examplefor an a combination reactionwhich is exothermic .

1.	(i) Give an examplefor an a combination reactionwhich is exothermic . (ii) Identify the oxidising agen, reducing agent in the following reaction : H_(2)S+Clrarr2HCl+S (iii) Name the phenomenon due to which the taste and smell of oily food changes when kept for a long time in open. Suggest one method to prevent it.
Answer» SOLUTION :(i) `CaO+H_(2)OrarrCa(OH)_(2)+"heat"` (ii) OXIDISING agent __`Cl_(2)` Reducing agent ___`H_(2)S` (iii) Rancidity , keep food inn airtight containers.