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

Write a short note on the following:

Carbylamine reaction

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.

Zinc amalgam and dilute hydrochloric acid

How will you bring about the following conversion in not more than two steps?

Propanone to Propene

How will you bring about the following conversion in not more than two steps?

Benzoic acid to m-Nitrobenzyl alcohol

Complete the synthesis by giving missing starting material, reagent or product.

\[\ce{CH3COCH2COOC2H5 ->[(i) NaBH4][(ii) H+]}\]

Arrange the set of compounds in order of increasing boiling points.

Bromomethane, Bromoform, Chloromethane, Dibromomethane.

Arrange the set of compounds in order of increasing boiling points.

1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Explain why alkyl halides, though polar, are immiscible with water?

p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.

Give a simple chemical test to distinguish between the following pair of compounds:

Ethanal and Propanal

Write the structure of an isomer of compound C₄H₉Br which is most reactive towards S_N1 reaction

In non-ideal solution, what type of deviation shows the formation of maximum boiling azeotropes?

Write the major products(s) in the following:

Distinguish between:

C₆H₅-COCH₃ and C₆H₅-CHO

Distinguish between: CH3COOH and HCOOH

A and B are two functional isomers of compound C₃H₆O.On heating with NaOH and I₂, isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3^rd of tetrahedral voids?

Which would undergo S_N1 reaction faster in the following pair and why?

State Raoult’s law for the solution containing volatile components

How do you convert the following:

Ethanol to propanenitrile