Hydrocarbon $(A)$ reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. $(A)$ is _______.

C H_{3} - C H_{3}

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C H \equiv C H

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C H_{4}

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C H_{2} = C H_{2}

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Solution

The correct option is C $C H_{4}$
Hydrocarbon (A) is methane $(C H_{4})$ . It reacts with bromine by substitution to form methyl bromide $C H_{3} - B r$
$C H_{4} + B r_{2} \to C H_{3} - B r + H B r$

Methyl bromide by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms.
$2 C H_{3} B r + 2 N a \to C H_{3} - C H_{3} + 2 N a B r$

In Wurtz reaction, when same alkyl halide is used, the product alkane has even number of C atoms.
The hydrocarbon containing less than four carbon atoms with even number of C atoms is ethane $(C H_{3} - C H_{3})$ .

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Q. Hydrocarbon (A) on monobrination forms an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is:

A straight chain hydrocarbon has the molecular formula C8H10. The hybridisation for the carbon atoms from one end of the chain to the other are respectively $s p^{3}, s p^{2}, s p^{2}, s p^{3}, s p^{2}, s p^{2}, s p$ and $s p$ . The structural formula of the hydrocarbon would be

Q. Match the column

A, B

and

C

suitably.

Reactabts $(A)$	Products $(B)$	Name of the reaction $(C)$
$C H_{3} - C H_{3} + C l_{2}$	$C O_{2} + H_{2} O$	Addition reaction
$C_{2} H_{6} + O_{2}$	$C H_{2} = C H_{2}$	Thermal cracking
$_{n} C H_{2} = C H_{2}$	$C H_{2} = C H_{2} + C H_{4}$	Substitution reactions
$C H_{3} - C H_{2} - C H_{3}$	$C H_{3} - C H_{2} C l + H C l$	Polymerisation
$C H \equiv C H + H_{2}$	$[- C H_{2} - C H_{2} -]_{n}$	Combustion

Q. Which will undergo reaction with ammonical

A g N O_{3}

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Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is _______.

Hydrocarbon $(A)$ reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. $(A)$ is _______.