Biomolecules — Chemistry STD 12 Science — Question

Explain the mechanism and reactivity of nucleophilic addition reactions of carbonyl compounds (Aldehyde and ketone).

Define Osmotic Pressure. Prove that Osmotic pressure is a colligative property.

Describe the common name system and IUPAC system of naming amines.

1. When 2.56 g of sulphur was dissolved in 100 g of CS₂, the freezing point lowered by 0.383 K. Calculate the formula of sulphur (S_x).

(K_f for CS₂ = 3.83 K kg mol^–1, Atomic mass of Sulphur = 32 g mol^–1]

2. Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing.

1. 1.2% sodium chloride solution?
2. 0.4% sodium chloride solution?

Answer the following questions.
Write chemical reaction to show that glucose contains aldehyde as carbonyl group.

What is the difference between order of a reaction and its molecularity?

Explain with two examples each of the following: Coordination entity, ligand coordination number, coordination polyhedron, homoleptic and heteroleptic.

How is osmotic pressure determined by Berkeley-Hartley method ?

Answer the following questions:
Write balanced equations to represent what happens when.

1. Cu²⁺ is treated with KI.
2. Acidified potassium dichromate solution is reacted with iron (II) solution. (ionic equation).