DP Physics (first assessment 2025)

Test builder »

Question 20N.1A.SL.TZ0.11

Select a Test
Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1A.SL.TZ0.11
Level SL Paper 1A Time zone TZ0
Command term Question number 11 Adapted from N/A
11.
[Maximum mark: 1]
20N.1A.SL.TZ0.11

An ideal gas of constant mass is heated in a container of constant volume.

What is the reason for the increase in pressure of the gas?

A.  The average number of molecules per unit volume increases.

B.  The average force per impact at the container wall increases.

C.  Molecules collide with each other more frequently.

D.  Molecules occupy a greater fractional volume of the container.

[1]

Markscheme

B

Examiners report

Many candidates chose option C which is a typical misconception that collision between molecules has something to do with pressure.

Syllabus sections