Which one of the following on heating will not give $CO_2$?

Thermal decomposition of sodium nitrate at temperatures above $800\,^oC$ yields ..........

Identify the products $A, B, C, D$ in the reactions given below:
$(X) \ NaCl \xrightarrow{\text{Aq. Electrolysis}} A + B(g) + Cl_2$
$A + Al \rightarrow NaAlO_2 + B(g)$
$(Y) \ A + Cl_2 \rightarrow C + D + H_2O$

In which of the compounds does hydrogen have an oxidation state of $-1$?

$P \xrightarrow{\Delta } Q$ (metallic solid) $+ R \uparrow + S \uparrow$
$X \xrightarrow{\Delta } Y$ (amphoteric oxide) $+ R \uparrow + S \uparrow$
$P$ and $X$ are respectively:

Which of the following statements is incorrect?