SELECT * FROM question_mgmt as q WHERE id=3578 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=255 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)
How many structural isomers can you draw for pentane?
Three structural isomers are possible for pentane.
(i) Pentane
CH3 - CH2 - CH2 - CH2 - CH3
(ii) 2 Methyl butane (Isopentane)
(iii) 2,2,dimethyl propane (Neopentane)
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