The reaction between water and quick lime gives rise to calcium hydroxide. Which of the following statements are correct?

$\mathrm{I}.$ The reaction is exothermic

$\mathrm{II}.$ The pH of the final solution is less than $7$

$\mathrm{III}.$ The reaction is endothermic

$\mathrm{IV}.$ The pH of the final solution is greater than $7$

Test whether the following equation is balanced or not.

${\mathrm{Fe}}_2{\mathrm{O}}_3+\mathrm{CO}\to \mathrm{Fe}+{\mathrm{CO}}_2$

If not, balance the above equation by hit and trial method.

Balance the following equations :

$\mathrm{Na} + {\mathrm{H}}_2\mathrm{O}\to \mathrm{NaOH} + {\mathrm{H}}_2$

Balance the following equations :

${\mathrm{NaHCO}}_3 \to {\mathrm{Na}}_2{\mathrm{CO}}_3 + {\mathrm{H}}_2\mathrm{O} + {\mathrm{CO}}_2$

Balance the following equations :

${\mathrm{C}}_2{\mathrm{H}}_6 + {\mathrm{O}}_2 \to {\mathrm{CO}}_2 + {\mathrm{H}}_2\mathrm{O}$

Balance the following equations :

${\mathrm{NH}}_3 + {\mathrm{O}}_2 \to \mathrm{NO} + {\mathrm{H}}_2\mathrm{O}$