Question

Nitrate of which of the following elements are converted to their oxides on heating ?
A. Li
B. Na
C. K
D. Mg

Answer 1

Correct Answer - A::D
`2LiNO_(3)overset(Delta)rarr Li_(2)O+2NO_(2)+(1)/(2)O_(2)`
`Mg(NO_(3))_(2)overset(Delta)rarr MgO+2NO_(2)+(1)/(2)O_(2)`
Oxides are more stable as compared to nitrates due to the higher lattice enthalpies of oxides than of nitrates.