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InterviewSolution
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(1)If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(a) Do you think rust is different from iron?(2)If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(b) Can you change rust back into iron by some simple method?(3)If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(c) Do you think formation of rust from iron is a chemical change?(4)If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(d) Give two other examples of a similar type of change. |
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Answer» (1) If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (2) If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (b) Can you change rust back into iron by some simple method? (3) If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (c) Do you think formation of rust from iron is a chemical change? (4) If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (d) Give two other examples of a similar type of change. |
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