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प्रश्न
Identify the gas evolved and give the chemical test in the following case:
Dilute hydrochloric acid reacts with iron (II) sulphide.
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उत्तर
Gas Evolved: When dilute hydrochloric acid reacts with iron (II) sulphide, the gas evolved is hydrogen sulphide.
Reaction:
\[\ce{FeS + 2HCl -> FeCl2 + H2S ^}\]
Chemical Test for Hydrogen Sulphide: To test for H2S gas, you can use lead acetate paper:
- Moisten a strip of lead acetate paper.
- Expose it to the gas that evolved.
Observation: If H2S is present, the lead acetate paper will turn black due to the formation of lead sulphide (PbS).
\[\ce{Pb(C2H3O2)2 + H2S -> PbS + 2CH3COOH}\]
संबंधित प्रश्न
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When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.
Choose the current answer from the options given below :
When conc. H2SO4 comes in contact with sugar, it becomes black due to
What would you observe in the following case:
Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid.
Give one equation to show the following property of sulphuric acid:
Dehydrating property
An acid obtained from concentrated nitric acid on reaction with Sulphur ______.
