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

Arrange the following compounds in increasing order of their property as indicated:

CH₃CH₂CH(Br)COOH, CH₃CH(Br)CH₂COOH, (CH₃)₂CHCOOH, CH₃CH₂CH₂COOH (acid strength)

Arrange the following compounds in increasing order of their property as indicated:

Benzoic acid, 4-Nitrobenzoic acid, 3, 4-Dinitrobenzoic acid, 4-Methoxybenzoic acid (acid strength)

Predict the product of the following reaction:

Write the equation of the following reaction:

Friedel-Crafts reaction - alkylation of anisole

Write the equation of the following reaction:

Nitration of anisole.

Write the equation of the following reaction:

Bromination of anisole in ethanoic acid medium.

Write the equation of the following reaction:

Friedel-Craft’s acetylation of anisole.

Discuss briefly, giving an example in the given case and the role of coordination compounds in analytical chemistry.

Discuss briefly, giving an example in the given case and the role of coordination compounds in the extraction/metallurgy of metals.

Name the reagents used in the following reactions:

Predict the products of the following reactions:

Draw the structures of major monohalo products in each of the following reactions :

Explain the term with suitable examples:

Alcosol

Explain the term with suitable examples:

Aerosol

Explain the term with suitable examples:

Hydrosol

Write a short note on the following:

Coupling reaction

Give plausible explanation for the following:

During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.

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

Give one example each of lyophobic sol and lyophilic sol.

What are lyophilic and lyophobic colloids ? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?