Assign reasons for each of the following: (i) Transition metals generally form coloured compounds.

Thermal stability: - Carbonates: - The carbonates of alkali metals except lithium carbonate are stable towards heat. The carbonates of alkaline earth metals and Lithium carbonate decompose on heating to form...

(c) either metals or non-metals 

(c) Generally, metals are ductile. However, mercury metal - a liquid at room temperature - cannot be drawn into wires and is not ductile.

(i)  Transition metals show paramagnetic behaviour. Paramagnetism arises due to the presence of unpaired electrons with each electron having a magnetic moment associated with its spin angular momentum and orbital...

It is because HNO3 is a strong oxidising agent. It oxidises the Hq produced to H2O and itself get reduced to any of the oxides of the nitrogen, like NO2, NO,...

(i) This is because transition metals have strong metallic bonds as they have a large number of unpaired electrons. (ii) The catalytic activity of transition metals is attributed to the following...

(i) It is due to (a) Intermolecular hydrogen bonding in HF. (b) Higher H—F bond dissociation enthalpy than H—Cl. (ii) As P—P single bond (213 kJ mol-1) in P4 is much weaker than...

(i) This is due to d-d transition. When visible (white) light falls on a compound, it absorbs certain radiations of white light and transmit the remaining ones. The transmitted light...

(i) In aqueous solution Cu+ undergoes disproportionation to form a more stable Cu2+ ion. 2Cu+(aq) → 2Cu2+(aq) + Cu(s) The higher stability of Cu2+ in aqueous solution may be attributed to its greater negative...

(i) This is due to presence of unpaired electrons in the (n–1) d orbitals of transition elements. (ii) The chemistry of actinoids is not as smooth as lanthanoid because they are...