UPSC CAPF AC 2014 Paper
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Question : 106 of 125
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Which of the following are not chemical changes?
1. Tempering of iron
2. Conversion of iron piece into an electro-magnet by passing the current around the iron.
3. Melting of iron
4. Rusting of iron
Select the correct answer using the codes given below. Codes
1. Tempering of iron
2. Conversion of iron piece into an electro-magnet by passing the current around the iron.
3. Melting of iron
4. Rusting of iron
Select the correct answer using the codes given below. Codes
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