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प्रश्न
Give a chemical test to distinguish between dilute sulphuric acid and conc. sulphuric acid.
उत्तर
- Dilute sulphuric acid treated with zinc gives hydrogen gas, which burns with a pop sound. Concentrated \[\ce{H2SO4}\] gives \[\ce{SO2}\] gas with zinc, and the gas turns acidified potassium dichromate paper green.
- Barium chloride solution gives white ppt. with dilute \[\ce{H2SO4}\]. This white ppt. is insoluble in all acids.Concentrated \[\ce{H2SO4}\] and \[\ce{NaCl}\] mixture when heated gives dense white fumes if a glass rod dipped in ammonia solution is brought near it.
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संबंधित प्रश्न
State one relevant observation for given reactions:
Action of concentrated Sulphuric acid on hydrated copper sulfate
Name the products formed when hot and concentrated sulphuric acid reacts with Carbon.
Define the following term : Dehydrating agent
Give reason for the following:
When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
Why is sulphuric acid known as king of chemicals and oil vitriol ?
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 of the following case:
When dilute hydrochloric acid is added to sodium carbonate crystals.
Give balanced chemical equation to prepare the following salt:
Sodium sulphate using dilute sulphuric acid
Name the anion present in the following compound:
Compound D, when warmed with dilute sulphuric acid, gives a gas that turns acidified dichromate solution green.
