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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
The acid which is used in the preparation of a volatile acid
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Hot concentrated sulphuric acid is added to sodium chloride crystals.
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Write the observation for the following:
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\[\ce{2NaHCO3 + H2SO4 -> Na2SO4 + 2H2O + 2CO2}\]
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Name the anion present in the following compound:
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Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
What is the property of sulphuric acid that makes it a suitable reagent for the reaction?
