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When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs?

(a) Sub adiabatic lapse rate

(b) Super adiabatic lapse rate

(c) Neutral lapse rate

(d) Adiabatic lapse rate

I have been asked this question during a job interview.

This key question is from Dispersion of Air Pollutants, Contol of Gaseous Pollutants in portion Air Pollution of Environmental Engineering

1 Answer

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Best answer
Right choice is (a) Sub adiabatic lapse rate

Explanation: When the temperature increases with an increase in altitude, Sub adiabatic lapse rate occur and there will be stable environment.

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