WAEC Chemistry 2011 Theory — Question 21

Question 21 of 31 from the West African Examinations Council (WAEC) Chemistry 2011 Theory paper, with the correct answer and a full explanation.

7(a) A compound X reacts with excess HNO3(aq) to give Carbon (IV) oxide and another compound Y. A solution of Y reacts with NaOH(aq) to form a white precipitate which is soluble in excess NaOH(aq). Identify X and Y.

Model answer