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प्रश्न
Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
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उत्तर
The carbohydrates contain carbon, hydrogen and oxygen. The hydrogen and oxygen are always in ratio of 2:1 which is absorbed by acid in the form of water, thus leaving carbon behind. This is also called as charring.
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संबंधित प्रश्न
Write balanced chemical equations to show The dehydrating property of conc. Sulphuric acid with sugar.
A, B, C, and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated.
A = Typical acid property
B = Non volatile acid
C = Oxidizing agent
D = Dehydrating agent
Choose the property (A, B, C or D) depending on which is relevant to each of the following
1) Preparation of Hydrogen chloride gas
2) Preparation of Copper sulphate from copper oxide.
3) An action of conc. Sulphuric acid on Sulphur.
Identify the acid in the following case:
The acid which produces sugar charcoal from sugar.
Give two balanced reactions of the type to show the following property of sulphuric acid:
Acidic nature
Name the following:
Products obtained by treating zinc with dilute sulphuric acid.
Name the following:
Products obtained by treating ferrous sulphide with dilute sulphuric acid.
How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.
State your observation for the following case:
Paper soaked in potassium permanganate solution is introduced into a gas jar of sulphur dioxide.
The property exhibited by concentrated sulphuric acid when it is used to prepare hydrogen chloride gas from potassium chloride is ______.
Convert the following reaction into a balanced chemical equation:
Sodium hydroxide to sodium sulphate using sulphuric acid.
