Pre-weighed pieces of nylon, cotton, silk, and wool of equal measurements are taken and soaked in a beaker filled with water. After a few minutes, all cloth pieces were taken out of the beaker simultaneously and weighed again. Which of the following options places them in the correct order of their final weights?

Silk > Wool > Cotton > Nylon

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Cotton > Silk > Nylon > Wool

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Wool > Silk > Nylon > Cotton

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Wool > Cotton > Silk > Nylon

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Solution

The correct option is D Wool > Cotton > Silk > Nylon
$∙$ Higher the water absorption capacity, the greater the final weight of the fibre/fabric. In general, the water absorption capacity of natural fibres is more than that of synthetic fibres.
$∙$ Wool, silk and cotton being natural fibres have more water absorbing capacity than nylon i.e., a synthetic fibre.
$∙$ Wool becomes heaviest as it absorbs maximum water out of the given natural fibres.
$∙$ Cotton becomes heavier than silk as it absorbs more water than silk.
$∙$ Nylon gains the least weight due to lowest water absorption.
$∙$ So, the correct order of their final weights is- Wool > Cotton > Silk > Nylon.

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