EXAMPLE 1 12.0 g of calcium carbonate was heated till no further loss in weight and 5.28 g of carbon dioxide was produced. The mass of the residue (calcium oxide) was found to be 6.72 g. Show that these observations . are in accordance with the law of conservation of mass.
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Tick () the correct answer .The acid used in car batteries is (a) Hydrochloric acid (c) Sulphuric acid 2 nswer. (b) Acetic acid (d) Lactic acid 2. This is basic in nature. O(d) Salt solutio (a) Baking soda O(b) Curd (c) Vinegar 5. Which of the following statements is not correct (a) Blue litmus paper remains blue in bases. (b) Turmeric paper changes to red in bases. (c) Turmeric paper remains yellow in acids. (d) Phenolphthalein remains colourless in bases. 4. The acid present in sour milk is (a) Acetic acid (b) Lactic acid (c) Formic acid (d) Hydrochloric acid 5. The acid present in our stomach that helps in digestion of foodis (a) Nitric acid (b) Acetic acid (d) Sulphuric acid (c) Hydrochloric acid
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