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

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

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

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

CH₃CH₂CHO and CH₃CH₂COCH₃

How will you distinguish between the following pair of terms?

Tetrahedral and octahedral voids

What type of deviation is shown by a mixture of ethanol and acetone? Give reason.

Propanal and Propanone

Out of CH₃CH₂ – CO – CH₂ – CH₃ and CH₃CH₂ – CH₂ – CO – CH₃, which gives iodoform test?

What do you understand by the term glycosidic linkage?

Which of the following is a fibre? Nylon, neoprene, PVC