The products of decomposition of Mg(NO3)2 are:
Correct answer: C. MgO, NO2, O2
- A. MgO and NO2
- B. Mg and NO2
- C. MgO, NO2, O2
- D. Mg(NO3)2
Explanation
The thermal decomposition of nitrates of group 2 produces metal oxide, nitrogen dioxide and oxygen. 2Mg(NO3)2 -> 2MgO + 4NO2 + O2 Hence, only option C is correct while others are incorrect.
This question appeared on the HEC Phase I 2017 paper, which you can sit online with every answer explained.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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