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प्रश्न
Give a chemical test to distinguish between dilute sulphuric acid and conc. sulphuric acid.
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उत्तर
- Dilute sulphuric acid treated with zinc gives hydrogen gas, which burns with a pop sound. Concentrated H2SO4 gives SO2 gas with zinc, and the gas turns acidified potassium dichromate paper green.
- Barium chloride solution gives a white ppt. with dilute H2SO4. This white ppt. is insoluble in all acids. Concentrated H2SO4 and NaCl mixture when heated gives dense white fumes if a glass rod dipped in ammonia solution is brought near it.
संबंधित प्रश्न
Give appropriate scientific reasons for The electrical conductivity of acetic acid is less in comparison to the electrical conductivity of dilute sulphuric acid at a given concentration.
Distinguish between the given pair of compounds using the test given within brackets:
Sodium nitrate and sodium sulphite (using dilute sulphuric acid).
Give reason for the following:
Sulphuric acid can form two kinds of salts with sodium chloride.
Describe the reaction that show
Concentrated sulphuric acid is a non-volatile acid.
Describe the reaction that show
Concentrated sulphuric acid is a dehydrating agent.
Describe the reaction that show
Concentrated sulphuric acid behaves as oxidizing agent.
Name the catalyst used in the process.
Name the gas evolved in following case:
The gas produced by the action of concentrated sulphuric acid on sodium chloride.
State your observation for the following case :
Dry red rose petals are placed in the jar of sulphur dioxide.
In the given equation identify the role played by concentrated sulphuric acid S + 2H2SO4→ 3SO2 + 2H2O
