Page 9 - ACE YR IGCSE A TOP APPROACH TO CHEM

(ii) Describe why this happened in the time of 5 minutes.

[2]
[Total: 10]

5 Helium is a type of gas used to fill balloons. The balloons float in the air.

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(a) What is the property of helium that supports its usage?

[1]

(b) Describe and draw the arrangement and movement of particles in helium gas.

[3]

(c) Explain, in terms of the kinetic particle theory, why balloons are inflated.

[2]

(d) If the balloon is kept outside the house under the hot sun, it bursts.
Explain, in terms of the kinetic particle theory, why the balloon bursts.

[3]

(e) The balloon filled with helium deflated faster than the balloon filled with nitrogen. Explain
why.

[2]

Cambridge IGCSE TM
6 Ace Your Chemistry

Chapter 1.indd 6 3/4/22 11:57 AM