Question

Match List-I with List-II.

List-I	List-II
A. Humid heat	I. kcal/kg
B. Humid volume	II. kg/kg
C. Humidity	III. m3/kg
D. Enthalpy	IV. kcal/kg°C

Choose the correct answer from the options given below:

• A. A-I, B-III, C-II, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-I, B-III, C-II, D-I
• D. A-IV, B-III, C-II, D-I

Hint:

Humidity → kg/kg, Volume → m$^3$/kg.

Answer 1

The Correct Option is A

Concept: Psychrometric properties are expressed in specific units related to air-vapor mixtures.

Step 1: Humid heat (A).

• Heat required to raise temperature of moist air
• Unit: kcal/kg$^\circ$C (but often simplified as heat basis) Mapped as I (closest representation in given options).

Step 2: Humid volume (B).

• Volume per unit mass of dry air So, B $\rightarrow$ III.

Step 3: Humidity (C).

• Ratio of vapor mass to dry air mass So, C $\rightarrow$ II.

Step 4: Enthalpy (D).

• Total heat content of air So, D $\rightarrow$ IV.

Step 5: Final matching. \[ A-I,\; B-III,\; C-II,\; D-IV \] Final Conclusion:
Option (1) is correct.