Question
Define or explain chain isomerism and position isomerism with examples in each case.
✓
Answer
Chain isomerism
Chain isomerism arises due to the difference in the arrangement of C atoms in the chain. For
example, there are two isomers of butane, C4H10. In one of them, the carbon atoms lie in a
"straight-chain" whereas in the other the chain is branched.
Position isomerism
It is due to the difference in the position of functional groups.
For example, there are two structural isomers with the molecular formula C3H7Br. In one of them, the bromine atom is at the end of the chain, whereas in the other it is attached in the middle.
Chain isomerism arises due to the difference in the arrangement of C atoms in the chain. For
example, there are two isomers of butane, C4H10. In one of them, the carbon atoms lie in a
"straight-chain" whereas in the other the chain is branched.
Position isomerism
It is due to the difference in the position of functional groups.
For example, there are two structural isomers with the molecular formula C3H7Br. In one of them, the bromine atom is at the end of the chain, whereas in the other it is attached in the middle.
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→4 tones of bauxite, $150 Kg $ of sodium hydroxide and $600 \ Kg$ of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
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(ii) Write down the word which correctly completes the following sentence.
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(iv) Write the equation for the reaction which takes place at cathode.
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