Is it an exothermic or an endothermic process:

${\mathrm{N}}_2\left(\mathrm{g}\right) + 3{\mathrm{H}}_2\left(\mathrm{g}\right)\to 2{\mathrm{NH}}_3 + 92\mathrm{kJ}$

(Just write Exothermic or Endothermic)

Separate out exothermic and endothermic process from the following:

${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \to {\mathrm{H}}_2\mathrm{O}\left(\mathrm{s}\right) + 6\mathrm{kJ}$

Is it an exothermic or an endothermic process:

$\mathrm{Ice} + \mathrm{Heat} \to \mathrm{Water}$

Is it an exothermic or an endothermic process:

When iron filings are added to a solution of copper sulphate heat is liberated.

Separate out exothermic and endothermic process from the following:

Heat is absorbed when water evaporates.

Is it an exothermic or an endothermic process:

Temperature drops when ammonium nitrate dissolves in water.

Is it an exothermic or an endothermic process:

Temperature of water increases on adding sulphuric acid to it.

From the following list select the combination reactions between (i) elements, (ii) compounds, and (iii) an element and a compound :

$\mathrm{CaO}\left(\mathrm{s}\right) + {\mathrm{CO}}_2\left(\mathrm{g}\right) \to {\mathrm{CaCO}}_{3 }\left(\mathrm{s}\right)$