$\mathrm{C}_{\mathrm{v}}$ and $\mathrm{C}_{\mathrm{p}}$ denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then

$(A)$ $\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

$(B)$ $\mathrm{C}_{\mathrm{p}}+\mathrm{C}_{\mathrm{v}}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

$(C)$ $\mathrm{C}_{\mathrm{p}} / \mathrm{C}_{\mathrm{v}}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

$(D)$ $\mathrm{C}_{\mathrm{p}} \cdot \mathrm{C}_v$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

Explain heat capacity of substance and write its equation and unit.

Water is used to cool radiators of engines, because

The quantities of heat required to raise the temperature of two solid copper spheres of radil $r _{1}$ and $r _{2}\left( r _{1}=1.5 r _{2}\right)$ through $1\;K$ are in the ratio

Write definition unit of molar specific heat.