Account for the following :
(i) Phenol has a smaller dipole moment than methanol.
(ii) Phenols do not give protonation reaction readily.

Account for the following : (i) Phenol exhibits acidic character (ii) Phenol does not get protonated readily (iii) Phenol, Benzendiazonium chloride, NaOH solution gives red dye.

Account for the following: (i) The boiling point of ethanol is higher than that of methanol. (ii) Phenol is a stronger acid than an alcohol. (iii) The boiling points of ethers are lower than isomeric alcohols.

Account for the following: (i) The boiling points of alchols decrease with increase in branching of the alkyl chain. (ii) Phenol does not give protonation reaction readily. (iii) Phenyl methyl ehter reacts with HI to give phenol and methyl iodide and not iodobenzene and methyl alcohol.

Account for the following : (i) PCl_(5) is more covalent than PCl_(3) . (ii) Iron on reaction with HCl forms FeCl_(2) and not FeCl_(3) . (iii) The two O-O bond lengths is the ozone molecule are equal.

Give reasons for the following : (i) The muscular walls of ventricles are thicker than the walls of atria. (ii) Arteries have thick elastic walls.

Account for the following : (i) Bi(V) is a stronger oxidizing agent than Sb(V). (ii) N-N single bond is weaker than P-P single bond. (iii) Noble gases have very low boiling points.

How will you account for the following? (i) Actionoids exhibit more number of oxidation states than lanthanoides. ii) Atomic fadii of second and third transition series elements are almost identical.

Account for the following : (i) Ammonia is more basic than phosphine. (ii) Elements of Group - 16 generally show lower value of first ionisation enthalpy compared to the elements in the corresponding periods of Group - 15. (iii) Electron pair gain enthalpy with (-)ve sign for fluorine is less than that for chlorine.

Account for the following : Mg^(+2) is smaller than O-^(2) ion although both have same electronic structure . (ii) Ionisation enthalpy of nitrogen is more than that of oxygen .