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  4. Dehydration of butan-2-ol with conc. H2SO4 gives preferred product

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Q. Dehydration of butan-2-ol with conc. $H_{2}SO_{4}$ gives preferred product

Hydrocarbons

Solution:

image image $\xrightarrow[{ \Delta}]{H_{2}SO_{4}} $
$CH_{3}-CH=CH - CH_3 (80\%) +CH_{3}-CH_{2}-CH=CH_2(20\%)$
This is in accordance with Saytzeff's rule