Select the most appropriate option about boiling and condensation processes as expressed by the statements $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$.

$\mathrm{P}-$ The quantities of heat involved in evaporation and condensation of unit mass of fluid are identical

Q - The boiling and condensation of a single compound normally occur isothermally

$\mathrm{R}$ - The condensation is achieved at or below dew point and boiling occurs at triple point

(A) All $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ are true

(B) Only $\mathrm{P}$ and $\mathrm{Q}$ are true

(C) Only $\mathrm{P}$ is true

(D) Only $Q$ is true

Select the most appropriate option about boiling and condensation processes as expressed by the statements $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$.

$\mathrm{P}-$ The quantities of heat involved in evaporation and condensation of unit mass of fluid are identical

Q - The boiling and condensation of a single compound normally occur isothermally

$\mathrm{R}$ - The condensation is achieved at or below dew point and boiling occurs at triple point

(A) All $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ are true

(B) Only $\mathrm{P}$ and $\mathrm{Q}$ are true

(C) Only $\mathrm{P}$ is true

(D) Only $Q$ is true

1 Answer

127 votes

(B) Only $\mathrm{P}$ and $\mathrm{Q}$ are true

127 votes

127