Answer - Rancidity is a chemical process in which edible oils or fats get oxidized over a period of time and become inedible (unfit for human consumption) is called rancidity.
Answer - 1. When oxidation and reduction take place simultaneously in a given chemical reaction, it is called redox reaction or oxidation-reduction. 2. No oxidation can take place without reduction and there is no reduction without oxidation at the same time. 3. When carbon monoxide is passed over heated ferric oxide, carbon monoxide gains oxygen (i.e. gets oxidized) to form carbon dioxide. At the same time, iron oxide gets reduced to metallic iron by the loss of oxygen. 4. Fe 2 O 3 + CO → 2Fe +2CO 2 ↑
Answer - 1. When H 2 S is passed through cadmium chloride solution, yellow precipitate of cadmium sulphate and hydrochloric acid solution are obtained. 2. The reaction is a double displacement reaction.
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