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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
State the inference drawn from the following observations:
Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S.
Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with Ethanol?
Give two balanced reactions of the type to show the following property of sulphuric acid:
Acidic nature
Give two balanced reactions of the type to show the following property of sulphuric acid:
Non-volatile nature
Give reason for the following:
When concentrated sulphuric acid is added to blue crystalline copper sulphate, it turns powdery white.
How are the following conversion brought about? Give equation and condition:
Dilute sulphuric acid to hydrogen.
How are the following conversion brought about? Give equation and condition:
Sodium chloride to hydrogen chloride.
What would you see, when a crystal of CuSO4.5H2O is placed in concentrated sulphuric acid? Give reason to explain your observation.
Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?
Name the acid formed when sulphur dioxide dissolves in water.
