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Chemical Engineering - Environmental Engineering - Discussion

Discussion Forum : Environmental Engineering - Section 2 (Q.No. 21)
Environmental Engineering
21.
Pick out the wrong statement.
Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value.
Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines.
Temperature in stratosphere rises with increasing altitude.
The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.
Abdul Tine said:   4 years ago
Green house body = allows the SHORT wavelength incoming solar radiation to come in but does not allow the LONG wavelength infra red radiation to escape out of the earth's atmosphere.
(1)
Piku Mondal said:   5 years ago
Option D is correct answer for this question. I agree.
Piku Mondal said:   5 years ago
Temperature increases as you gain altitude in the stratosphere and the thermosphere.

Temperature decreases as you gain altitude in the troposphere and mesosphere.
Anoop said:   6 years ago
Answer is C.
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