WAEC Chemistry 2021 Objective — Question 11

Question 11 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

11. Which of the graphs illustrates the variation of the solubility of a salt in water (y-axis) with increase in temperature (x-axis), if the dissolution process is exothermic?

A. I
B. II
C. IIICorrect
D. IV

Explanation

Since dissolution is exothermic, increasing temperature reduces solubility (Le Chatelier's principle) — a downward-sloping graph, shown in III.

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Chemistry 2021 Objective More Chemistry past papers