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प्रश्न
What would you observe in the following case:
Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid.
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उत्तर
Charring of sugar takes place. Sulphuric acid dehydrates sugar, leaving behind carbon, which is black. Black charred residue is observed.
\[\ce{C12H22O11 ->[Conc. H2SO4] \underset{Black charred residue}{12 C + 11H2O}}\]
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of concentrated sulphuric acid on Sulphur.
Give two balanced reactions of the type to show the following property of sulphuric acid:
Non-volatile nature
Name the following:
The precipitate obtained by treating carbon with hot concentrated sulphuric acid.
What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.
Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.
How are the following conversion brought about? Give equation and condition:
Sodium chloride to hydrogen chloride.
Give examples of the use of sulphuric acid as
An oxidizing agent
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Lead sulphate from lead nitrate.
The salt is formed when concentrated sulphuric acid reacts with KNO3 above 200°C.
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?
