Which of the following statements regarding chemical industry in India is / are correct

Chemical industry is one of the oldest industries in India

Dyestuff sector is one of the important segments of chemical industry

Textile industry accounts for the largest consumption of dyestuffs

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Which one of the following statements is not correct

Which one of the following statements is not correct

Which one of the following statements about bar magnet is correct

Which of the following statements is / are correct 

1. Acid rain reacts with buildings made from limestone
2. Burning of sulphur containing coal can contribute to acid rain
3. Eutrophication is an effective measure to control pollution

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The 'eye' of the cyclone has :