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6 Changes Physical and Chemical - National Council …

6 Physical and Chemical Changes MULTIPLE CHOICE QUESTIONS. 1. Which of the following is a Physical change? (a) Rusting of iron (b) Combustion of magnesium ribbon (c) Burning of candle (d) Melting of wax 2. Which of the following is a Chemical change? (a) Twinkling of stars ed (b) Cooking of vegetables h (c) Cutting of fruits pu T. (d) Boiling of water is re ER. bl 3. A Chemical change may involve . be NC. (a) change in colour only (b) change in temperature only (c) evolution of gas only . (d) any or all of the above 4. Which of the following is/are true when milk Changes into curd? o (i) Its state is changed from liquid to semi solid. tt (ii) It Changes colour. no (iii) It Changes taste. (iv) The change cannot be reversed. Choose the correct option from below : (a) (i) and (ii) are correct (b) (ii) and (iii) are correct (c) (i), (iii) and (iv) are correct (d) (i) to (iv) are correct 5. A man painted his main gate made up of iron, to (i) prevent it from rusting.

35 added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and step II are: (a) physical and chemical changes respectively.

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