Question

Temperature at upper layer of troposphere is ______.

• A. - ${15}^0$ C
• B. - ${25}^0$ C
• C. - ${40}^0$ C
• D. - ${54}^0$ C

Answer 1

The correct option is D - ${54}^0$ C

As the density of the gases in this layer decrease with height, the air becomes thinner. Therefore, the temperature in the troposphere also decreases with height in response. At the uppermost boundary of the troposphere, the air reaches nearly negative 66 degrees Fahrenheit which is equal to $-{54}^{o}C$.

So, the correct answer is option D.