Lighter metals like $Na , K$ combine with $CO _2$ to form corresponding .. …………….
- ANitrates
- ✓Carbonates
- COxide
- Dnone
Answer: B.
View full solution →Question types
Air. question types
98 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
98
Questions
8
Question groups
5
Question types
01
M C Q
34 Q→02Fill in the blank with correct answer.[1 Mark each]
15 Q→03true or false.[1 Mark each]
10 Q→04Assertion & Reason
2 Q→05[1 Mark Questions]
23 Q→06[2 Mark Questions]
9 Q→07Match The Following.
3 Q→08[7 marks Questions]
2 Q→Sample Questions
Air. questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
…………… gas is essential for the proper growth of all plants.
- ✓Nitrogen
- B$CO_2$
- COxygen
- Dnone
Answer: A.
View full solution →Carbon dioxide gas is …………… in nature
- Abasic
- ✓acidic
- Csweet
- Dnone
Answer: B.
View full solution →Venus atmosphere consists of roughly 96 – 97% of …………….
- AOxygen
- BNitrogen
- ✓Carbon dioxide
- Dnone
Answer: C.
View full solution →A gas which is used to remove carbon impurities from steel.
- ANitrogen
- ✓Oxygen
- CCarbon dioxide
- DHydrogen
Answer: B.
View full solution →Phosphorous bums with suffocating smell and gives ……………..
Oxygen is used to oxidize …………….
Liquid nitrogen is used as a ……………..
……………. is used as a substitute for compressed air in tyres.
……………. is used to prepare soft drinks or aerated drinks.
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
The increase in the levels of greenhouse gases results in the gradual increase of temperature of the earth’s surface.
Rain water is actually the purest form of water.
An average increase in the temperature of the atmosphere is called as acid rain.
Acid rain inhibits germination and growth of seedlings.
Assertion : Carbon dioxide occurs as carbonates in nature.
Reason : Carbon dioxide can exist as a liquid at atmospheric pressure.
Reason : Carbon dioxide can exist as a liquid at atmospheric pressure.
- ABoth assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- ✓The assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: C.
View full solution →Assertion : Green house gases maintain the temperature.
Reason : Green house gases absorb the infra red rays.
Reason : Green house gases absorb the infra red rays.
- ✓Both assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: A.
View full solution →What will happen if oxygen has the capacity to burn itself?
Complete the table:
What is green house effect?
Complete the following:
What are the effects of global warming?
- Explain the physical properties of carbon dioxide.
- Write the preventive measures to control the effect of global warming
Write the uses of nitrogen.
Write the physical properties of nitrogen.
Explain the uses of oxygen.
Why does the fish die when it is taken out of water?
| 1. | Nitrogen | (a) | Acid rain |
| 2. | $CO _2$ | (b) | Global warming |
| 3. | Melting of glaciers | (c) | Volcanic gases |
| 4. | Corrosion of bridges | (d) | Aerated drinks |
| 1. | Oxygen | (a) | Carbon dioxide |
| 2. | Azote | (b) | Nitrogen |
| 3. | Solvay process | (c) | Vital life |
| 4. | Gun powder | (d) | No life |
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
Crossword puzzle :
Across:
1. A gas that supports combustion.
4. The compound that turns lime water milky.
5. The Gaseous jacket that surrounds the Earth.
6. It is used as a refrigerant.
7. Solid form of carbon dioxide.
Down:
2. The process by which atmospheri&oitrogen is converted into nitrates.
3. The common name of the compound formed when nails are exposed to moist air.
8. It changes the fertility of the soil, destroys plants and aquatic life.
Across:
1. A gas that supports combustion.
4. The compound that turns lime water milky.
5. The Gaseous jacket that surrounds the Earth.
6. It is used as a refrigerant.
7. Solid form of carbon dioxide.
Down:
2. The process by which atmospheri&oitrogen is converted into nitrates.
3. The common name of the compound formed when nails are exposed to moist air.
8. It changes the fertility of the soil, destroys plants and aquatic life.
What are the effects of acid rain? How can we prevent them?
Generate a Air. paper free
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