When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuses into air. Explain how bromine vapour diffuse into air.

Academic Chemistry NCERT Class 9

Air and bromine vapour are made up of tiny moving particles, that collide with each other and bounce about in all directions due to which both the gas particles mix uniformly. This is how bromine vapour diffuses into the air.

Tutorialspoint

Updated on: 10-Oct-2022

95 Views

State whether the following statement is true or false :Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
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 :(a) air is heavier than bromine(b) both air and bromine have the same density(c) bromine is heavier than air(d) bromine cannot be heavier than air because it is going upwards against gravity
When a gas jar containing colourless air is kept upside down over a gas jar full of brown-coloured bromine vapour, then after some time, the brown colour of bromine vapour spreads into the upper gas jar making both the gas jars appear brown in colour. Which of the following conclusion obtained from these observations is incorrect?(a) bromine vapour is made of tiny particles which are moving(b) air is made up of tiny particles which are moving(c) the particles of bromine are moving but those of air are not moving(d) even though bromine vapour is heavier that air, it can move up against gravity
A student placed a gas jar containing air in the upside-down position over a gas jar full of red-brown bromine vapours. He observed that the red-brown colour spread upwards into the jar containing air. Based on this observation, the student concluded that it is only the bromine vapour which moves up and diffuses into the air in the upper jar, the air from the upper jar does not move down by diffusion into the lower jar containing bromine vapours. Do you agree with this conclusion of the student? Give a reason for your answer.
Which of the two diffuses slower: bromine vapour into air or copper sulphate into water?
Bromine particles are almost twice as heavy as chlorine particles. Which gas will diffuse faster; bromine (vapour) or chlorine? Explain your answer.
Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?
How will you demonstrate that water vapour is present in air?
How will you demonstrate that water vapour is present in the air?
Clouds are(a) tiny drops of water floating in air(b) mixture of dust and water vapour(c) particles of water vapour(d) rain drops in air.
Fill in the Blanks:The air is a ______________ of gases, dust particles, and water vapour.
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of:(a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour
Consider the following statements and choose the correct one:(a) We know that air or atmosphere always contains some water vapour or moisture in it.(b) Humidity is a measure of water vapour or moisture in air.(c) When the amount of water vapour in the air is high, we say humidity is high and the air feels moist or damp.(d) All the above.
Bromine
What is Bromine?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements