Advertisements
Advertisements
Question
Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?
Advertisements
Solution
Bromine diffuses slowly in air because the motion of bromine particles is obstructed due to the collision with the moving air particles. But bromine diffuses very rapidly in vacuum because in vacuum there is no gas, and the motion of the particles of bromine gas is not obstructed by any other particle. Therefore, the diffusion rate in vacuum is high.
APPEARS IN
RELATED QUESTIONS
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
Define the term matter. What is it composed of?
What are the two conditions for the interconversion of states of matter ?
All kinds of matter
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name a non-metal which is a good conductor of electricity.
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
The three important metalloids are.............................. and ..........................
Name a metal which forms amalgams.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Choose the correct answer.
A 5 per cent sugar solution means that :
State whether the following statement is true or false :
Bread is an example of solid foam.
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How will you separate a mixture containing sand and sugar ?
Atoms are tiny particles that repel each other when they are squeezed very close.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
