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

Complete the following equations: CaF₂+H₂SO₄ →

What are the dispersed phase and dispersion medium in milk?

Complete the following equations: C + conc. H₂SO₄ →

Draw the structure of the following:

H₂SO₄

How do emulsifires stabilise emulsion? Name two emulsifiers.

Action of soap is due to emulsification and micelle formation. Comment.

Give four uses of emulsions.

Write a short note on the following:

Coupling reaction

CH₃CO₂H or CH₂FCO₂H

Which acid of the pair shown here would you expect to be stronger?

CH₂FCO₂H or CH₂ClCO₂H

Which acid of the pair shown here would you expect to be stronger?

CH₂FCH₂CH₂CO₂H or CH₃CHFCH₂CO₂H

Which acid of the pair shown here would you expect to be stronger?

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)

Mention three areas in which H₂SO₄ plays an important role.

Why is `K_(a_2) "<<" K_(a_1)` for `H_2SO_4` in water?

Describe the manufacture of H₂SO₄ by contact process?

Write balanced equations for NaCl is heated with sulphuric acid in the presence of MnO₂

What is ferromagnetism?

Iron (z=26) is highly ferromagnetic. Explain.