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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
Give one equation to show the following properties of sulphuric acid:
Dehydrating property
Why is concentrated sulphuric acid kept in air tight bottles?
What would you observe in the following case?
Dilute sulphuric acid is added to ferrous sulphate solution.
Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.
Give examples of the use of sulphuric acid as
Non-volatile acid
In this question, you required to supply the word (or words) that will make the sentence correct. Rewrite the copper statement.
Copper sulphate crystals are dehydrate by sulphuric acid.
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Sodium Sulphate from sodium carbonate.
Give balanced chemical equation to prepare the following salt:
Sodium sulphate using dilute sulphuric acid
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
State the method of collection of the gas formed above.
