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JAMB Chemistry 2011 Objective — Question 34

Question 34 of 49 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2011 Objective paper, with the correct answer and a full explanation.

In the laboratory preparation of oxygen, dried oxygen is usually collected over

A. A. tetraoxosulphate (IV) acid
B. B. hydrochloric acid
C. C. mercuryCorrect
D. D. calcium chloride

Explanation

Dried oxygen is usually collected over mercury in the laboratory.

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