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प्रश्न
How will you show that air is dissolved in water?
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उत्तर
To show that air is dissolved in the water we take water in a pan and heat it. Just before it boils, you will notice some bubbles at the inner surface of the pan. These bubbles are formed because of air dissolved in water.
संबंधित प्रश्न
What do you observe when Calcium is heated and then tested with moist blue and red litmus – paper?
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
Give reason:
When water is heated, we see bubbles rising up.
Name the following:
The product formed when phosphorus burns in oxygen.
Compare the three main components of air i.e. nitrogen, oxygen and carbon dioxide with reference to their density and solubility, nature and reactivity.
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
______ is the percentage of nitrogen in air.
______ is necessary for all acids.
The components of air which are harmful to living beings are ______.
State whether the following statement is true or false. If false, correct them.
Plants produce oxygen during the process of making their own food.
