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

Why the tansition element form a large number of complex compounds ?

An organic compound contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollen's reagent but forms an addition compound with sodium hydrogensulphite and give positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acid. Write the possible structure of the compound.

Explain with equations, the reaction to obtain alcohols by reduction of aldehydes and ketones.

A person suffering from high blood pressure should take less common salt, why?

For the reaction:
2A + B → A₂B
The rate = k[A][B]² with k = 2.0 × 10^–6 mol^–2 L² s^–1. Calculate the initial rate of the reaction when [A] = 0.1 mol L^–1, [B] = 0.2 mol L^–1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L^–1.

In what way is the electronic configuration of the transition elements different from to that of the non-transition elements?

Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH₂CONH₂) is dissolved in 850 g of water. Calculate the vapour pressure of water for this solution and its relative lowering.

Henry’s law constant for the molality of methane in benzene at 298 K is 4.27 × 10⁵ mm Hg. Calculate the solubility of methane in benzene at 298 K under 760 mm Hg.