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प्रश्न
Fill in the blank
Aquatic plants and animals use _________ in water.
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उत्तर
Aquatic plants and animals use dissolved oxygen in the water.
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संबंधित प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is:
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
You are given a test tube with two outlets and a bottle of lime water. Using same, how would you demonstrate experimentally the presence of carbon dioxide in air.
Why is air considered as a mixture?
What happens if the percentage of carbon-dioxide increases in the air?
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
Oxygen is used to oxidize ______.
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.
