Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.

At 300 K, 36 g of glucose present in a litre of its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of the solution is 1.52 bars at the same temperature, what would be its concentration?

Determine the amount of CaCl₂ (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27°C.

Determine the osmotic pressure of a solution prepared by dissolving 25 mg of K₂SO₄ in 2 liter of water at 25°C, assuming that it is completely dissociated.

What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?

What are micelles? Give an example of a micellers system.

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

Compare the chemistry of the actinoids with that of lanthanoids with reference to electronic configuration

Compare the chemistry of the actinoids with that of lanthanoids with reference to oxidation states

Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.

Discuss briefly, giving an example of the role of coordination compounds in medicinal chemistry.

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)

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.