Skip to content

Course home

Question bank·1.1 The particle model
Sign up

1.1 The particle model

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344
Question 19

A quality-control chemist investigates three processes in a materials laboratory.

In Process C, each letter represents an atom, and letters written together represent atoms joined in one particle.

ProcessBefore the processAfter the process
AP particles are closely packed in fixed, regular positions.P particles are randomly arranged, touching and able to slide past one another.
BQ particles and R particles are in separate substances.Q particles are spread evenly among R particles.
CThe particles are WX and YY.The particles are WY and XY.

All three processes can be reversed to produce their starting materials.

Which processes are physical changes?

Explain your answer using the information in the table. Explain why reversibility alone cannot be used to decide whether a change is physical.

[5]
Markscheme

1.1 The particle model Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 The particle model

93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.

More questions