Shalu took two pieces of fabrics, X and Y. When brought close to flames, she noticed that X burns with a pungent odour, while Y didn't. What is X and Y?

X= Wool, Y= Nylon

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X= Wool, Y= Cotton

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X= Jute, Y= Polyester

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X= Polyester, Y= Cotton

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Solution

The correct option is D X= Polyester, Y= Cotton
Synthetic fibres burns with a pungent smell while natural fibre do not give any prominant odour on burning.
Thus, X must be a synthetic fibre and Y must be a natural fibre.

Polyester is a synthetic fibre as it is made from petroleum by chemical processes.

Cotton is a natural fibre as it is obatined from a plant.
It burn and gives ash when brought close to the flame.
Hence X is polyester and Y is cotton.

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