Which will dehydrate at fastest rate by $H_{3} P O_{4}$ ?

2-Methyl butane-2-ol

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3-Methyl butane-2-ol

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Butane-1-ol

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2-Methyl butane-1-ol

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Solution

The correct option is A 2-Methyl butane-2-ol
As intermediate carbocation formed in the case of 2-methyl butane-2-ol is $3^{0}$ , it is most stable and reactivity will be highest.

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The IUPAC name of the compound $(C H_{3})_{2} C H C H_{2} C H_{2} C l$ is

B r_{2}

B r^{-} A g O H / Δ - ---- \to P

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