Advertisements
Advertisements
प्रश्न
Identify the gas evolved and give the chemical test in the following case:
Dilute hydrochloric acid reacts with iron (II) sulphide.
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 \[\ce{H2S}\] gas, you can use lead acetate paper:
- Moisten a strip of lead acetate paper.
- Expose it to the gas evolved.
Observation: If \[\ce{H2S}\] is present, the lead acetate paper will turn black due to the formation of lead sulphide \[\ce{(PbS)}\].
\[\ce{Pb(C2H3O2)2 + H2S -> PbS + 2CH3COOH}\]
APPEARS IN
संबंधित प्रश्न
Identify the acid in the case:
The acid on mixing with lead nitrate solution produces a white precipitate, which is insoluble even on heating.
In the contact process for the manufacture of sulphuric acid give the equations for the conversion of sulphur trioxide to sulphuric acid.
What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.
Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
Describe the reaction that show
Concentrated sulphuric acid is a dehydrating agent.
Describe the reaction that show
Dilute sulphuric acid behaves as dibasic acid.
How will you distinguish between dilute H2SO4 and conc. H2SO4 ?
Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Hydrogen
State your observation for the following case :
Moist blue litmus is introduced into a gas jar of sulphur dioxide.
Convert the following reaction into a balanced chemical equation:
Sodium hydroxide to sodium sulphate using sulphuric acid.
