Heat and Energy Class-9 Exe-6D MCQs Concise Physics ICSE Selina Solutions Ch-6. In this article you would learn to solve MCQS on Greenhouse Effect and Global Warming. Visit official Website CISCE for detail information about ICSE Board Class-9.
Heat and Energy Exe-6D MCQs Type
Concise Physics ICSE Class-9 Selina Publishers.
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise Selina Publishers |
| Chapter-6 | Heat and Energy |
| Exe-6D | Greenhouse Effect and Global Warming |
| Topics | Solution of Exe-6(D) MCQs |
| Academic Session | 2025-2026 |
Exercise- 6D Greenhouse Effect and Global Warming
page -162
MCQs
(Choose the correct answer from the options given below).
Que-1: The gases which are good …………… of long wavelength infrared radiations are called greenhouse gases.
(a) emitters
(b) reflectors
(c) absorbers
(d) none of the above
Ans: (c) absorbers
Hint- Green house effect is the process of warming of the earth’s surface and it’s lower atmosphere, by absorption of infrared radiations of long wavelength emitted out from the surface of the earth by greenhouse gases such as carbon dioxide, methane, nitrous oxide, ozone, chlorofluorocarbon (CFCs), etc.
Que-2: Which of the following is a green house gas ?
(a) oxygen
(b) nitrogen
(c) chlorine
(d) carbon dioxide
Ans: (d) carbon dioxide
Hint- Carbon dioxide is a green house gas. Other green house gases are methane, nitrous oxide, ozone and chlorofluorocarbon.
Que-3: The increase of carbon dioxide gas in atmosphere will cause —
(a) decrease in temperature
(b) increase in temperature
(c) decrease in humidity
(d) increase in humidity
Ans: (b) increase in temperature
Hint- The increase of carbon dioxide gas in atmosphere will cause an increase in green house effect hence increasing global warming and increase in temperature.
Que-4: Without green house effect, the average temperature of earth’s surface would have been :
(a) -18°C
(b) 33°C
(c) 0°C
(d) 15°C
Ans: (a) -18°C
Hint- In the absence of green house gases from the atmosphere, entire heat energy radiated from the earth’s surface and objects on it, would escape out into space and then average temperature on earth would be -18°C instead of 15.5°C .
Que-5: Global warming means a …………… in average effective temperature near the earth’s surface due to an …………… in the amount of greenhouse gases in its atmosphere.
(a) decrease, increase
(b) decreases, decrease
(c) increase, decrease
(d) increase, increase
Ans: (d) increase, increase
Hint- Global warming means a increase in average effective temperature near the earth’s surface due to an increase in the amount of green house gases in its atmosphere.
Que-6: The global warming has resulted in
(a) the increase in yield of crops
(b) the decrease in sea levels
(c) the decrease in human deaths
(d) the increase in sea levels.
(d) the increase in sea levels
Hint- Due to global warming melting of ice is more and the area of sea ice around the poles is shrinking. It is expected that in the next 50 years, the ice at both the poles will melt completely and therefore the sea levels will rise.
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