Skip to content

Course home

Question bank·4.2 Identifying the products of chemical reactions
Sign up

4.2 Identifying the products of chemical reactions

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334
Question 6

Working in a fume cupboard, a technician tests four gas samples, P, Q, R and S. The samples are oxygen, hydrogen, carbon dioxide and chlorine, with each gas present once.

SampleObservations
PA glowing splint does not relight; limewater turns milky
QA lit splint gives a squeaky pop; limewater remains colourless
RLimewater remains colourless; damp blue litmus paper remains blue
SA lit splint gives no pop; damp blue litmus paper turns red and is then bleached white

Which sample could be oxygen?

[1]
A

Sample P

B

Sample R

C

Sample S

D

Sample Q

Markscheme

4.2 Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Identifying the products of chemical reactions

107 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.

More questions