Advertisements
Advertisements
प्रश्न
Describe simple experiments to show the presence of -
carbon dioxide in air using a test tube with outlets containing lime water.
Advertisements
उत्तर
Carbon dioxide in air:
Apparatus- A test tube containing lime water with two outlets ‘A’ and ‘B’.
Procedure -Air is sucked slowly from the outlet ‘B’ as shown above.
Observation - The lime water in the test tube turns milky.
Conclusion - Air which is sucked in from end ‘A’, passes through the lime water and contains carbon dioxide which turns lime water milky [This is a test for carbon dioxide gas].
APPEARS IN
संबंधित प्रश्न
Fill in the blank by choosing the correct word from the given list.
List: oxygen, carbonic, suIphur dioxide gas, precipitation, helium
____________ gas can cause acid rain.
What happens when Sodium burns in oxygen ? Also give the balanced chemical equation for the reaction.
Write ‘True’ or ‘False’ in front of following statement.
The rust formed on the surface of iron easily crumbles.
Tick (√ ) the most appropriate answer.
Galvanising is the process of coating iron with a layer of molten :
Write the balanced chemical equation of the manganese dioxide.
State how nitrogen is utilised by plants for their growth. Give a reason why nitrogen is used in flushing food packages.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
Distinguish between:
Combustion & Rusting with suitable word equations only?
Give the main experimental points only to demonstrate that candle-gains weight on burning.
What is meant by burning?
