Identify the product when magnesium burns in air.

$X$ and $Y$ are two metals. When burnt in air,$X$ forms only oxide while $Y$ forms oxide and nitride. The metals $X$ and $Y$ may be

Identify $A$ and $B$ from the following reaction: $NaNO_3 \xrightarrow{\Delta} A + B$

Which factor makes $Li$ the strongest reducing agent in aqueous solution?

Which of the following statements is incorrect?

The lightest metal is