Question

4. What happens when an inflated air balloon is pricked with a pin? Name the property of the gas exhibited
by this observation.
5. Ramesh took 2 beakers A and B containing hot water and cold water respectively. In cach beaker be
dropped a crystal of copper sulphate. After sometime what did he observe and why?
6 Identify the diffusion process that takes place in the following.
a) Swelling up of a raisin an keeping in water. b) Spreading of virus on sneezing
c) Preserving pickles in salt. d) Spreading of smell of cake being baked throughout the house
e) Aquatic animals using oxygen dissolved in water during respiration.
7. Suggest an activity to show that the rate of diffusion of liquids decreases with increase in density or
attraction forces between particles of the liquid.
8 Read the information from the table and answer the questions given below.
Name of the gas Hydrogen (H2) Oxygen (02) Methane (CH) Carbon dioxide (CO)
2
Molecular mass
32
16
44
a) Which
gas has least rate of diffusion?
c) Which gas
b) In Oxygen and Carbon dioxide which gas spread easily?
diffuses rapidly. Why?
d) Arrange the gases in increasing order of diffusion rate.
9. Soda. Soft drinks (coca-cola) etc. are the carbonated drinks and prepared mainly because of the
of carbon dioxide in water.​

Answer 1

Answer:

The hole cannot allow so much air to come out at once. Explanation: The pressure inside the inflated balloon is much more than the atmospheric pressure When a pin is pricked,all the gaseous particles present in balloon intend to move from high pressure to low pressure,due to which the balloon burst.

Explanation: