Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Write the conditions to maximize the yield of H₂SO₄ by contact process.

Why pKa of F-CH₂-COOH is lower than that of Cl−CH₂−COOH?

Write the name of vitamin whose deficiency causes bone deformities in children.

Distinguish between the following : Benzoic acid and methyl benzoate

What are emulsions?

What are the different types of emulsions? Give one example of each type.

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)