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CAIE IGCSE Chemistry 7.1.7 To Compare Hydrogen Ion Concentration Questions

Compare acidic, neutral and alkaline solutions using pH, hydrogen-ion concentration and universal-indicator colour evidence.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • use lower pH to identify greater hydrogen-ion concentration and stronger relative acidity
  • identify pH seven and green universal indicator as neutral under standard conditions
  • use higher pH and blue-to-purple colours to identify increasing relative alkalinity
  • interpret universal-indicator and pH data to compare unknown solutions

CAIE IGCSE Chemistry 7.1.7 To Compare Hydrogen Ion Concentration Questions question 1

[Maximum number: 1]

Which statements about aqueous ethanoic acid are correct?

1 It contains the functional group -COOH .
2 It reacts with carbonates to produce hydrogen.
3 It turns universal indicator paper blue.
4 It has a pH lower than pH 7.

A

1 and 2

B

1 and 3

C

1 and 4

D

2 and 4

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