Unit of Mixing Ratio is:

Correct option is C

Correct option: (c) kg/kg
Why option (c) is correct:
· Mixing ratio is defined as the mass of water vapour per unit mass of dry air.
· Hence, its unit is:
· kg of water vapour / kg of dry air
· It is a mass–mass ratio, not volume-based.
❌ Why other options are incorrect
· (a) %
· Percentage is not a standard scientific unit for mixing ratio.
· (b) kg/m³
· Represents density, not mixing ratio.
· (d) m³/m³
· Used for volumetric ratios, not mass ratios.
�� Key Points
· Mixing ratio is commonly used in meteorology and agrometeorology.
· Unit = kg/kg (often expressed as g/kg for convenience).
· It remains nearly constant with temperature changes.