9701 MCQ Solution 55

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Question 55: [Inorganic> Group 2]
What are the products of the thermal decomposition of magnesium nitrate?
A magnesium nitride and oxygen
B magnesium oxide and nitrogen
C magnesium oxide, nitrogen and oxygen
D magnesium oxide, nitrogen dioxide and oxygen
Reference: Past Exam Paper -June 2003 Paper 1 Q15
Solution 55:
Answer: D.
It is written in the book. when magnesium nitrate undergoes thermal decomposition magnesium oxide solid , and nitrogen dioxide gas and oxygen gas are the products . this is the same for all group 2. the overall reaction is:

2Mg(NO3)2=2MgO +4NO2 + O2.

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