An ideal gas undergoes isothermal compression from 5m³ to 1 m³ against a constant external pressure of 4 Nm^–2. Heat released in this process is used to increase the temperature of 1 mole of Al. If molar heat capacity of Al is 24 J mol^–1 K^–1, the temperature of Al increases by :

The correct match between item 'I' and item 'II' is :

Item 'I' (compound)		Item 'II' (reagent)
(A)	Lysine	(P)	1-naphthol
(B)	Furfural	(Q)	ninhydrin
(C)	Benzylalcohol	(R)	KMnO4
(D)	Styrene	(S)	Ceric ammonium nitrate

The number of 2-centre-2-electron and 3-centre -2-electron bonds in B₂H₆, respectively, are :

Haemoglobin and gold sol are examples of :