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Question
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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Solution
Charring of sugar takes place. Sulphuric acid dehydrates sugar, leaving behind carbon, which is black. Black charred residue is observed.
\[\ce{C12H22O11 ->[Conc. H2SO4] \underset{Black charred residue}{12 C + 11H2O}}\]
RELATED QUESTIONS
Give reason for the following:
Sulphuric acid can form two kinds of salts with sodium chloride.
Give reason for the following:
When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.
Give reason for the following:
H2SO4 cannot be prepared by heating sodium sulphate with conc. HCl or HNO3
How are the following conversion brought about? Give equation and condition:
Sodium chloride to hydrogen chloride.
How are the following conversion brought about? Give equation and condition:
Oxalic acid to carbon monoxide.
Give examples of the use of sulphuric acid as
Non-volatile acid
Give examples of the use of sulphuric acid as
An oxidizing agent
Give reason for the following:
Concentrated sulphuric acid is kept in airtight bottles.
Name the gas evolved in following case:
The gas produced by the action of concentrated sulphuric acid on sodium chloride.
Write a balanced equation for the following conversion:
Lead sulphate from lead nitrate and sulphuric acid.
