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Vite Trie ot ais hStatementsTrue/False1. Cooking of rice is a physical change2. Rusting of iron takes place in the presence of moist air3. Magnesium oxide reacts with water to form magnesiumhydroxide which is acidic in character4. When bread goes stale, a physical change lakes place5. A reddish deposit formed on an iron nail, when placed in a coppersulphate solution is of copper metal.6. The gas produced when washing soda reacts with dilute sulphuricacid is carbon monoxide7, Limewater is solution of calcium carbonale in water8. Crystallization is used to obtain pure crystals from impure crystals69 |
Answer» <p>1) True.cooking of rice changes its State.2) true. iron oxides are formed by utilising moisture in air3) false. magnesium Hydroxide is basic in character4) false when bread goes stale a chemical change takes place5) True. it is a displacement reaction were copper metal deposits itself on the nail 6) False. the gas produced when washing soda reacts with dilute sulphuric acid is carbon dioxide7) false. lime water is a diluted form of calcium hydroxide.8)True</p> | |