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Q.

A student accidentally splashes a few drops of conc. H2SO4 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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a

Dehydrates the cotton with burning

b

Heats up the cotton

c

Causes the cotton to react with air

d

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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