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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Water containing dissolved carbon dioxide can dissolve marble.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Fill in the blank :
________ is the most abundant inert gas present in air.
Write down the composition of three main gases present in air by volume.
Fill in the blank
Aquatic plants and animals use _________ in water.
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.
The diagrams below represents an experiment to show the presence of a component of air.

- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
How will you prove that soil contains air in it?
Write the percentage of the gases present in air.

Nitrogen is essential for burning.
Write the reaction of carbon dioxide with lime water.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
