WAEC Chemistry 2022 Objective — Question 20

Question 20 of 50 from the West African Examinations Council (WAEC) Chemistry 2022 Objective paper, with the correct answer and a full explanation.

Which of the following acids would form normal salt only?

A. Tetraoxosulphate (VI) acid
B. Trioxonitrate (V) acidCorrect
C. Tetraoxophosphate (V) acid
D. Trioxosulphate (IV) acid

Explanation

Trioxonitrate (V) acid (HNO3) is monobasic (has only one replaceable hydrogen ion), so it can only form normal salts, unlike the polybasic acids in the other options which can form both normal and acid salts.

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