Question

Magnesium nitrate, magnesium hydroxide and magnesium carbonate all decompose when heated.

Which statement about these decomposition reactions is correct?
A. Magnesium carbonate decomposes to release carbon dioxide and oxygen
B. Magnesium hydroxide decomposes to release hydrogen and oxygen
C. Magnesium hydroxide decomposes to release water vapour
D. Magnesium nitrate decomposes to release oxygen only​

Answer 1

C

Step-by-step explanation:

The reactions:

`\mathrm{Mg(NO_3)_2 \longrightarrow MgO+ 2NO_2 +O_2}\\</p><p>\mathrm{Mg(OH)_2 \longrightarrow MgO + H_2O}\\</p><p>\mathrm{MgCO_3 \longrightarrow MgO +CO_2}`