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(i) Give an example for an a combinatio...

(i) Give an example for an a combination reaction which 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.

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(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.
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OSWAAL PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-TOPIC-2 (Types of Chemical Reactions-Corrosion and Rancidity) (SHORT ANSWER TYPE QUESTION-II)
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