Give plausible reason for the fact that the tran-sition metals have high enthalpy of atomization.

Why do transition elements have high value of hydration enthalpy?

Give a reason for each of the following: Ionic compounds have a high melting point.

Give reason for the fact that crystal field theory is not applied to complexes of many group metals .

Give biological reason for the following statement The birth rate in India is very high.

Give a reason for each of the following: Alkali metals are good reducing agents.

Explain gives reason. (a) Transition metal and many of their compounds show paramagnetic behavior. (b) The enthalpies of atomisation of the transition metal are high . (c) The transition metals generally from coloured compounds.

Assign a reason for each of the following observation : (i) The transition metals are hard and have high melting and boiling points (ii) The ionisation enthalpies (first and second) in the first series of the transition elements are found to vary irregularly

Assertion: Gases are easily adsorbed on the surface of metals, especially transition metals. Reason: Transition metals have free valencies

Give reasons for each of NaCl has a high melting point.

Give reasons for the following: Alkali metals are good reducing agents.