Advertisements
Advertisements
Question
Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Write a balanced chemical equation for the following:
Action of concentrated sulphuric acid on Sulphur.
How will you distinguish between dilute hydrochloric acid and dilute sulphuric acid using lead nitrate solution?
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.
Give one equation to show the following properties of sulphuric acid:
Acidic nature
What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.
Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
Why is sulphuric acid known as king of chemicals and oil vitriol ?
Name the gas evolved in following case:
The gas produced by the action of concentrated sulphuric acid on sodium chloride.
Write balanced chemical equation to show :
The oxidizing action of conc.sulphuric acid on carbon
An acid obtained from concentrated nitric acid on reaction with Sulphur ______.
