Q54 of 312 Page 242

The molecular formula of the third member of the homologous series of ketones is:

The third member of homologous series of ketones is pentanone.

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52 Which one of the following is not a fossil fuel? 53 Butanone is a four-carbon compound having the functional group: 55 The functional group present in propanal is: 56 An organic compound having the molecular formula C3H6O can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquid which is used as a solvent for nail polish. The isomer B is also a liquid. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory

(a) What is compound A?


(b) Write the electron-dot structure of A.


(c) What is compound B?


(d) Write the electron-dot structure of B.


(e) Name the lower homologue of compound B which is used in preserving biological specimens.