Classify the following chemical reactions as exothermic or endothermic: (i) Water is added to quicklime. (ii) Dilute sulphuric acid is added to zinc granules. (iii) When ammonium chloride is dissolved in water in a test tube it becomes cold. (iv) The decomposition of vegetable matter into compost. (v) Electrolysis of water. (vi) Silver chloride turns grey in the Presence of sunlight to form silver metal’