Alcohols, Phenols and Ethers — Chemistry STD 12 Science — Question

What is meant by stability of a coordination compound in solution? State the factors which govern stability of complexes.

Answer the following question:
How will you convert phenol to benzoic acid?

Mention the IUPAC rule used to write the formulas of mononuclear coordination compounds.

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

Explain the stability of the highest oxidation states of the 3d series.

For an elementary reaction:
2A + B → 3C
the rate of appearance of C at time ‘t’ is 1.3 × 10-⁴ mol L-¹ s-¹. Calculate at this time:

1. Rate of the reaction.
2. Rate of disappearance of A.

1. Define the following terms:

1. Mole fraction.
2. Ideal solution.

2. 15.0 g of an unknown molecular material is dissolved in 450 g of water. The resulting solution freezes at - 0.34°C. What is the molar mass of the material?

(K_f for water = 1.86 K kg mol^–1).

1. Differentiate between molarity and molality for a solution. How does a change in temperature influence their values?
2. Calculate the freezing point of an aqueous solution containing10.50g of MgBr₂ in 200 g of water. (Molar mass of MgBr₂ = 184 g)

(K_f for water = 1.86 K kg mol^–1)

Answer the following question:
What is the freezing point of 0.4 molal solution of acetic acid in benzene in which it dimerises to the extent of 85%? Freezing point of benzene is 278.4K and its molar heat of fusion is 10.042kJ mol^-1.