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प्रश्न
Give a chemical test to distinguish between the following gases.
HCl and H2S
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उत्तर
| Hydrogen chloride | Hydrogen sulphide |
| Odour of gas: Pungent choking odour. | Odour of gas: Smell as of rotten eggs. |
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संबंधित प्रश्न
When electric current is passed through acidulated water ______ of water takes place.
Give an example of a reaction where the following are involved:
Solution
Give an example of the following chemical change.
Two solids combine to form a liquid
Give an example of the following chemical change.
A reaction where colour change is noticed
Write the chemical reaction where the following changes are observed.
Gas is evolved
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Complete the table given below.
| Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
______ is the chemical name of rust.
