PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

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?

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields a single monochloride.

Draw the structure of the major monohalo product in the following reaction:

\[\ce{CH3CH2Br + NaI ->}\]

A hydrocarbon C₅H₁₀ does not react with chlorine in dark but gives a single monochloro compound C₅H₉Cl in bright sunlight. Identify the hydrocarbon.

Write the equation for the preparation of 1-iodobutane from 1-butanol.

Write the equation for the preparation of 1-iodobutane from 1-chlorobutane.

How will you bring about the following conversion?

Ethanol to but-1-yne

How will you bring about the following conversion?

Propene to 1-nitropropane

How will you bring about the following conversion?

Propene to propyne

How will you bring about the following conversion?

Ethanol to ethyl fluoride

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2CH2Cl + NaI ->[acetone][heat]}\]

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2CH = CH2 + HBr->[peroxide]}\]

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH = C(CH3)2 + HBr ->}\]

Primary alkyl halide C₄H₉Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C₈H₁₈ which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.