Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Give a plausible explanation for the following:

Why are amines less acidic than alcohols of comparable molecular masses?

Arrange the following compounds in increasing order of their boiling points.

CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃

Show how is the following alcohol prepared by the reaction of a suitable Grignard reagent on methanal?

\[\begin{array}{cc}
\ce{CH3 - CH - CH2OH}\\
|\phantom{........}\\
\ce{CH3}\phantom{....}\\
\end{array}\]

Show how is the following alcohol prepared by the reaction of a suitable Grignard reagent on methanal?

Predict the major product of acid catalysed dehydration of 1-methylcyclohexanol.

Predict the major product of acid catalysed dehydration of butan-1-ol.

What is meant by hydroboration-oxidation reaction? Illustrate it with an example.

Write the mechanism of hydration of ethene to yield ethanol.

Show how will you synthesize 1-phenylethanol from a suitable alkene.

How is the following conversion carried out?

\[\ce{Propene -> Propan-2-ol}\]

How is the following conversion carried out?

\[\ce{Benzyl chloride -> Benzyl alcohol}\]

How is the following conversion carried out?

\[\ce{Ethyl magnesium chloride -> Propan-1-ol}\]

How is the following conversion carried out?

\[\ce{Methyl magnesium bromide -> 2-Methylpropan-2-ol}\]

Name the reagent used in the following reaction:

Dehydration of propan-2-ol to propene.

Name the reagent used in the following reaction:

Butan-2-one to butan-2-ol.

Show how you would synthesise the following alcohol from an appropriate alkene?

Show how you would synthesise the following alcohol from an appropriate alkene?

Show how you would synthesise the following alcohol from an appropriate alkene?

Why is sulphuric acid not used during the reaction of alcohols with KI?