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

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.

How the following conversion can be carried out?

Propene to propan-1-ol

How the following conversion can be carried out?

Benzyl alcohol to 2-phenylethanoic acid

How the following conversion can be carried out?

2-Methyl-1-propene to 2-chloro-2-methylpropane

How the following conversion can be carried out?

But-1-ene to n-butyliodide

How will you convert: Phenol to 2, 4, 6 − trinitrophenol?

Write the fomulae of the following compounds :

Tetraaquodichlorochromium (III) chloride

Write the fomulae of the following compounds

Potassium tetracyanoaurate (III) ion

Write the reaction involved when D-glucose is treated with the following reagent:

Br₂ water

What happens when D-glucose is treated with the following reagent?

HI

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with SO₂? Write the ionic equation for the reaction.

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields four isomeric monochlorides.

Define lanthanoid contraction.