The increasing basicity order of the following compounds is :

The tests performed on compound X and their inferences are :

	Test	Inference
(a)	2, 4 - DNP test	Coloured precipitate
(b)	Idoform test	Yellow precipitate
(c)	Azo-dye test	No dye formation

Compound 'X' is :

A solution containing 62 g ethylene glycol in 250 g water is cooled to $$-$$ 10^oC. If K_f for water is 1.86 K kg mol^$$-$$1 , the amount of water (in g) separated as ice is :

When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second electron gain enthalpy is :