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Tyndall Effect

The yellow co...

Question

The yellow colour of straw and wool can be removed by bleaching with a solution of:

A

iodine

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B

nitrites

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C

sulphites

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D

caustic soda

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Solution

The correct option is C sulphites
The vapour of burning sulphur is employed for removing color from whitening wool, silk, and straw. Sulphur forms sulphur dioxide $(S O_{2})$ which acts on the yellow coloring matter.

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