NCERT Class 9 Science-Natural Resources[The Breath of Life: Air] [NCERT Based General Studies (GS)]: Questions 1 - 6 of 20
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Question 1
Question MCQ▾
Air plays vital role in regulating temperature of a place by acting as:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Bad conductor of heat | |
b. | Does not allows sudden changes in temperature | |
c. | Blanket | |
d. | All a., b. and c. are correct | |
Question 2
Question MCQ▾
Life-supporting zone of the earth is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Lithosphere | |
b. | Biosphere | |
c. | Hydrosphere | |
d. | Atmosphere | |
Question 3
Question MCQ▾
Rain drops are formed by:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | When temperature of the air is very low | |
b. | Condensation of water vapours | |
c. | Dust and other suspended particles that acts as nucleus for these drops to form around | |
d. | Both b. and c. are correct | |
Question 4
Question MCQ▾
Industrial pollution is controlled by:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Modification of industrial processes | |
b. | Treatment of industrial waste | |
c. | Use of catalytic convertors AND Use of tall chimneys | |
d. | All c., b. and a. are correct | |
Question 5
Question MCQ▾
Smog is the combination of:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Pollution and fog | |
b. | Particulate matter and fog | |
c. | Smoke and fog | |
d. | Fog in air | |
Question 6
Question MCQ▾
Chlorofluorocarbons which the atmosphere largely are
Choices
| Choice (4) | Response | |
|---|---|---|
a. | CCl2F2 | |
b. | CCl3F | |
c. | CCl4 | |
d. | All a., b. and c. are correct | |