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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.
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संबंधित प्रश्न
Quicklime is not used to dry HCl gas because _____.
Name the products formed when hot and concentrated sulphuric acid reacts with Copper.
Why is H2SO4 is not used as a drying agent for H2S?
What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.
Give reason for the following:
Sulphuric acid can form two kinds of salts with sodium chloride.
Describe the reaction that show
Concentrated sulphuric acid behaves as oxidizing agent.
What do you observe when barium chloride solution is added to dilute sulphuric acid?
Name the gas evolved in following case:
The gas produced by the action of concentrated sulphuric acid on sodium chloride.
State one appropriate observation of the following:
Dehydration of concentrated sulphuric acid with sugar crystals.
Give balanced chemical equation to prepare the following salt:
Sodium sulphate using dilute sulphuric acid
