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A student accidentally splashes a few drops of conc. $H_{2} {SO}_{4}$ on his cotton shirt. After a while, the splashed parts blacken and the holes appear. This has happened because sulphuric acid

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Dehydrates the cotton with burning

Heats up the cotton

Causes the cotton to react with air

Removes the elements of water from cotton

answer is D.

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Detailed Solution

Sulphuric acid removes the elements of water from cotton. This is the charring action of sulphuric acid.
It removes the elements of water and partial burning occurs. In this process, hydrogen and oxygen are removed.

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