Radiation from Gases, Greenhouse Effect – 1 – MCQs with Answers
1. Which of the following gases is/are not capable to emit and to absorb radiant heat energy?a. Nitrogen (N
2)
b. Water vapour (H
2O )
c. Carbon monoxide (CO)
d. all of the above
View Answer / Hide Answer 2. Which of the following gases is/are capable to emit and to absorb radiant heat energy?a. Carbon dioxide (CO
2)
b. Sulphur dioxide (SO
2)
c. Ammonia (NH
3)
d. all of the above
View Answer / Hide Answer ANSWER: d. all of the above
3. Gases absorb and emit radiant energya. in all wavelengths over the entire spectrum (λ = 0 to ∞)
b. only between narrow ranges of wavelengths
c. only at single constant wavelength
d. unpredictable
View Answer / Hide Answer ANSWER: b. only between narrow ranges of wavelengths
4. Which among the following factors is/are taken into account in calculation of radiation emitted or absorbed by a gas layer?a. thickness of the gas layer
b. shape of the gas enclosure
c. pressure in gas enclosure
d. all of the above
View Answer / Hide Answer ANSWER: d. all of the above
5. How is the incident radiation absorbed by a gas layer?a. A gas layer absorbs incident radiation slowly
b. A gas layer absorbs incident radiation rapidly
c. doesn't matter
d. unpredictable
View Answer / Hide Answer ANSWER: a. A gas layer absorbs incident radiation slowly
6. What is the relation between the intensity of radiation and the thickness of the layer, in case of gas?a. the intensity of radiation increases with increase in the thickness of gas layer
b. the intensity of radiation decreases with increase in the thickness of gas layer
c. the intensity of radiation remains unaffected with change in the thickness of gas layer
d. unpredictable
View Answer / Hide Answer ANSWER: b. the intensity of radiation decreases with increase in the thickness of gas layer
7. 90% of the incident radiation on glass in the visible range isa. absorbed
b. reflected
c. transmitted
d. none of the above
View Answer / Hide Answer 8. In greenhouse effect, the only infrared radiationsa. are allowed to exit from the interior surface
b. are not allowed to exit from the interior surface
c. cannot absorb heat energy
d. none of the above
View Answer / Hide Answer ANSWER: b. are not allowed to exit from the interior surface
