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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.
State your observation when sugar crystals are added to a hard glass test tube containing conc. 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
Identify the acid in the following case:
The acid which produces sugar charcoal from sugar.
Name the products formed when hot and concentrated sulphuric acid reacts with Copper.
Define the following term : Hygroscopic substance
Give reason for the following:
When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
Why is sulphuric acid known as king of chemicals and oil vitriol ?
Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Sulphur dioxide
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Lead sulphate from lead nitrate.
Give one equation to show the following property of sulphuric acid:
As a non-volatile acid
Write the balanced chemical equation for the following conversion:
Lead sulphate from lead nitrate solution and dilute sulphuric acid.
Distinguish between the following pair of compounds using the test given with brackets:
Dilute sulphuric acid and dilute hydrochloric acid (using barium chloride solution)
