NEET UG CHEMISTRY MCQ: ALCOHOLS & PHENOLS & ETHERS

1 Medium

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Analyzing +4 | -1

Decreasing order of boiling points of

n

-pentanol (

A

n

-pentane (

B

), 3-pentanol (

C

) and 2,2-dimethyl propanol (

D

) is :

View answer and explanation

Correct option: A

A,\;C,D,\;B

Option A is correct because boiling point decreases with branching and increases with molecular weight and hydrogen bonding.

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{\text{C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}{\text{OH}}\xrightarrow{{{\text{PCC}}}}{\text{A}}\xrightarrow[{\left( {{\text{ii}}} \right){\text{ }}{{\text{H}}_2}{\text{O/}}{{\text{H}}^ + }}]{{\left( {\text{i}} \right){\text{ HCN}}}}{\text{B}}

\mathrm{O}_2

{\mathrm{P}_2}{\mathrm{S}_5}