Chemistry
Grade-6
Easy
Question
The natural air filters from the following is:
- Rivers
- Trees
- Roads
- Mountains
Hint:
The organisms from where the food chain starts.
The correct answer is: Trees
The correct option is Trees.
- Trees can absorb some pollutants during natural life processes common to all plants. In gas exchange, plants absorb carbon dioxide, turn it into food, and release oxygen. While these pores are opening normally, other elements can also enter. These include contaminants such as chlorine, sulfur dioxide, and fluoride.
- Plants use some of these pollutants as nutrients and clean the air.
- Another reason trees act as natural air filters is that they have thorns and hairs that can trap pollutants in their leaves.
- More interestingly, the number of leaf stomata creates an electric charge that attracts airborne particles. Additionally, studies have found that coarse cracks in tree bark can trap and absorb pollutants.
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Various health deteriorating compounds present in the smoke are:
- Arsenic
- Carbon monoxide
- Both A and B
- Sulphur dioxide
Various health deteriorating compounds present in the smoke are:
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- Arsenic
- Carbon monoxide
- Both A and B
- Sulphur dioxide
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Which of the following measures need to be taken to control air pollution from vehicles?
(i) Installation of catalytic converters in vehicles
(ii) Use a hybrid or all-electric cars
(iii) Use internal combustion engines in vehicles
(iv) Use lead containing fuels
- Only (i) and (ii)
- Only (i) and (iii)
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(i) Installation of catalytic converters in vehicles
(ii) Use a hybrid or all-electric cars
(iii) Use internal combustion engines in vehicles
(iv) Use lead containing fuels
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- Only (i) and (ii)
- Only (i) and (iii)
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The most important cause of air pollution is:
- Cutting more tress
- Smoking
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- Throwing old items
The most important cause of air pollution is:
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Burning of fossils fuels like petrol, and diesel causes:
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- Acid rain
- Floods
Burning of fossils fuels like petrol, and diesel causes:
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- Global warming
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Which of the following is the most significant effect of particulate matter in the air on human health?
- Impaired blood formation
- Chest pain
- Headache
- Aggravation of respiratory disease
Which of the following is the most significant effect of particulate matter in the air on human health?
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- Impaired blood formation
- Chest pain
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When a mixture of rain and snow falls on the ground, it is called
- Hail
- Dew
- Sleet
- Mist
When a mixture of rain and snow falls on the ground, it is called
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- Hail
- Dew
- Sleet
- Mist
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Which of the following statements is correct?
(i) Dust particles are the solid, minute solid particles present in the air.
(ii) Krypton is also radioactive in nature.
(iii) The seeping of water into the ground is known as infiltration.
- Only (i) and (ii)
- Only (i) and (iii)
- Only (ii)
- Only (iii)
Which of the following statements is correct?
(i) Dust particles are the solid, minute solid particles present in the air.
(ii) Krypton is also radioactive in nature.
(iii) The seeping of water into the ground is known as infiltration.
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- Only (i) and (ii)
- Only (i) and (iii)
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Identify the processes which are not involved in the water cycle from the following:
(i) 
(ii) 
(iii) 
(iv) 
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- Only (ii) and (iii)
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Identify the processes which are not involved in the water cycle from the following:
(i) 
(ii) 
(iii) 
(iv) 
ChemistryGrade-6
- Only (i) and (ii)
- Only (ii) and (iii)
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What causes the decrease in the amount of carbon dioxide and increase in the amount of oxygen in the atmosphere?
What causes the decrease in the amount of carbon dioxide and increase in the amount of oxygen in the atmosphere?
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The phenomenon of circulation of water from the Earth’s surface to the atmosphere and from the atmosphere back to the Earth’s surface is called
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Which of the following forms of water vapor is not formed at low temperatures when water vapors condense?
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Which of the following forms of water vapor is not formed at low temperatures when water vapors condense?
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