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

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

Write the main products when methyl chloride is treated with AgCN.

 Give reasons for the following:

(CH₃)₃C–O–CH₃ on reaction with HI gives (CH₃)₃C–I and CH₃–OH as the main products and not (CH₃)₃C–OH and CH₃–I.

which poisonous gas is evolved when white phosphorus is heated with conc. NaOH solution? Write the chemical equation involved.

What happens when 

H₃PO₃ is heated ?

Write the reactions involved.

Out of , which is more reactive towards S_N1 reaction and why?

Given reasons: C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH₃–Cl.

Which would undergo S_N2 reaction faster in the following pair and why ?

What is meant by positive deviations from Raoult's law? Give an example. What is the sign of ∆_mixH for positive deviation?

Define azeotropes. 

Predict the products of the following reactions :

Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?

Write the names and structure of the monomers of the following polymers: 

Nylon-6, 6