Anhydrous $Na_2CO_3$ is also known as:

Which of the following,on thermal decomposition,form both acidic and basic oxides along with $O_2$?
$(i)$ $NaNO_3$ $(ii)$ $Ca(NO_3)_2$ $(iii)$ $Be(NO_3)_2$ $(iv)$ $LiNO_3$
The correct option is

$Na$ imparts yellow colour to Bunsen flame because of

Alkali metals have negative reduction potential and hence they behave as

When burnt in excess of oxygen, sodium forms a compound $X$ and potassium forms a compound $Y$. The magnetic natures of $X$ and $Y$ respectively are

On heating,$LiNO_3$ gives how many compounds among the following?
$Li_2O, N_2, O_2, LiNO_2, NO_2$