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When a Gas Jar Full of Air is Placed Upside Down on a Gas Jar Full of Bromine Vapours, the Red-brown Vapours of Bromine

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Question

When a gas jar full of air is placed upside down on a gas jar full of bromine  vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment :

Options

  • air is heavier than bromine

  • both air and bromine have the same density

  • bromine is heavier than air

  • bromine cannot be heavier than air because it is going upwards against gravity

MCQ
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Solution

Bromine is heavier than air

The process occurring here is diffusion and it is unaffected by the mass. Therefore, bromine being heavier, mixes with the colourless air.
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Chapter 1: Matter in Our Surroundings - Very Short Answers [Page 21]

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Lakhmir Singh Chemistry Part 2 [English] Class 9
Chapter 1 Matter in Our Surroundings
Very Short Answers | Q 63 | Page 21

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