Q60 of 97 Page 142

A hydrocarbon of molecular mass 72 g mol–1 gives a single monochloro derivative and two dichloro derivatives on photo chlorination. Give the structure of the hydrocarbon.

The hydrocarbon that has molecular mass of 72g mol-1 is the alkane C5H12. The tert-isomer of pentane that on photo-chlorination gives a single monochloro derivative and two dichloro derivatives. The structure of the alkane and the chloride derivatives are given as follows.


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58

Which of the following compounds will have the highest melting point and why?

(I)



(II)



(III)



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Write down the structure and IUPAC name for neo-pentylbromide.

 61

Name the alkene which will yield 1-chloro-1-methylcyclohexane by its reaction with HCl. Write the reactions involved.

 62

Which of the following haloalkanes reacts with aqueous KOH most easily? Explain giving reason.

(i) 1-Bromobutane


(ii) 2-Bromobutane


(iii) 2-Bromo-2-methylpropane


(iv) 2-Chlorobutane