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Which of the following options best describes a chemical change followed by a physical change?

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Which of the following options best describes a chemical change followed by a physical change?

(a) Condensation of water 

(b) Sublimation of camphor

(c) Freezing of water

(d) Fusion of ice

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(b) Sublimation of camphor

Camphor sublimes at 179°C. As soon as camphor sublimes, it starts burning and a new substance is formed.

Hence, a chemical change takes place just after a physical change when sublimation of camphor occurs.

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