9701 MCQ Solution 34

Question 34: [Inorganic > Group 2]:

Which of the following magnesium compounds lose mass when heated by a bunsen flame?

1 magnesium carbonate

2 magnesium nitrate

3 magnesium oxide

Reference: Past Exam Paper – November 2002 Paper 1 Q34

Solution 34:

Answer: B.

Both magnesium carbonate and magnesium nitrate decompose to give carbon dioxide and nitrogen dioxide, respectively. Magnesium oxide however is too thermally stable to decompose thus does not. Since 1 and 2 are correct option B is the only correct option.