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प्रश्न
Give a chemical test to distinguish between the following gases.
CO2 and SO2
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उत्तर
|
Carbon dioxide |
sulphur dioxide |
| Litmus test: It turns moist blue litmus faint red. | Litmus test: It turns moist blue litmus red and finally bleaches it. This bleaching is temporary. |
| The gas has no effect on filter paper dipped in acidified K2Cr2O7 or KMnO4. | It has no effect on lead acetate paper (Distinct from H2S). This test distinguishes it from H2S. |
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संबंधित प्रश्न
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Complete the following table and write your observations.
|
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
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Shake the gas with red litmus solution |
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Shake the gas with blue litmus solution |
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Apply a burning splint to a gas |
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Burning of paper is a ______ change.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Silver metal can displace hydrogen gas from nitric acid.
Water boiling into water vapour is an example of chemical change.
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
