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Consider the fol lowing statements and select the correct answer from the code given below :1. Presence of calcium sulphatd makes water hard and unfit for use.2. Diamond is harder than copper and iron.3. The main component of air is oxygen.4. Nitrogen is used in the preparation of vegetable ghee.Code:

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Consider the fol lowing statements and select the correct answer from the code given below :<br />1. Presence of calcium sulphatd makes water hard and unfit for use.<br />2. Diamond is harder than copper and iron.<br />3. The main component of air is oxygen.<br />4. Nitrogen is used in the preparation of vegetable ghee.<br />Code:






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