Q33 of 312 Page 240

Name any two fossil fuels.

Coal and petroleum are called fossil fuels because they were formed by the remains of prehistoric plants and animals buried under the earth long ago.

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33 Define a homologues series. Give the name and structural formula of one homologues of the following:

CH3OH

 33 Write the molecular formula of the third member of the homologues series of carbon compounds with general formula CnH2n+1OH. 34 Draw the structure for the following compounds:

(i) Propanone (ii) Butanone

 34 Write the IUPAC names of the following:

(i) HCHO (ii) CH3CHO (iii) CH3CH2CHO (iv) CH3CH2CH2CHO