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This week’s questions

Chapathi made of wheat is soft when hot but becomes hard when cold. Why?

V. L. Narasimhan, Hyderabad

Why does phenyl turn white when mixed with water?

Chappa Aparajita, Vishakapatnam, Andhra Pradesh

Why does hair not grow on scars?

Lena Saravanan, Tiruchengode, Tamil Nadu

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Sci Tech

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