JAMB Chemistry 2023 Objective — Question 8

Question 8 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2023 Objective paper, with the correct answer and a full explanation.

A compound that gives a brick-red colour to a non-luminous flame is likely to contain

A. Al³⁺
B. Na⁺
C. Ca²⁺Correct
D. Cu²⁺

Explanation

Flame test: Ca²⁺ → brick-red; Na⁺ → golden yellow; K⁺ → lilac; Cu²⁺ → blue-green; Ba²⁺ → green; Li⁺ → crimson red.

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