A 1 L flask is full of brown bromine vapour. | vedclass

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(A) Bromine vapour is a non-polar substance. When $CS_2$ (Carbon disulphide) or $CCl_4$ (Carbon tetrachloride) is added,bromine dissolves in these sol

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Pieces of marble

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(A) Bromine vapour is a non-polar substance. When $CS_2$ (Carbon disulphide) or $CCl_4$ (Carbon tetrachloride) is added,bromine dissolves in these solvents,reducing the vapour concentration and thus the intensity of the brown colour. Animal charcoal powder adsorbs bromine gas,which also reduces the intensity of the brown colour. Pieces of marble $(CaCO_3)$ do not react with bromine vapour,so the intensity of the brown colour does not decrease appreciably.

$A$ $1 \ L$ flask is full of brown bromine vapour. The intensity of the brown colour of the vapour will not decrease appreciably on adding which of the following to the flask?

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