Question

Take some pieces of paper of leaf size and make them waterproof. After completion, put half of these paper pieces in cold water and half in hot water. Do all the pieces of paper remains waterproof? Explain your observations and results with justifications.
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Answer 1

${ \huge{ \boxed{ \bold{ANSWER :-}}}}$

No, the paper in hot water will not remain waterproof as hot water dissolves or remove oils by making the molecules to expand.

As we have read that molecules expands in the presence of heat and contract in cold.

The cold water being low in temperature, makes the molecule of fat to contract and bind more perfectly.

Hence, the paper in hot water will not remain waterproof.

$\bold{thank \: you}$