The major product of the following reaction is :

The elevation of boiling point of 0.10 m aqueous CrCl₃.xNH₃ solution is two times that of 0.05 m aqueous CaCl₂ solution. The value of x is ______.

[Assume 100% ionisation of the complex and CaCl₂, coordination number of Cr as 6, and that all NH₃ molecules are present inside the coordination sphere]

The variation of equilibrium constant with temperature is given below :

Temperature	Equilibrium Constant
T1 = 25oC	K1 = 10
T2 = 100oC	K2 = 100

The values of $$\Delta $$H^o, $$\Delta $$G^o at
T₁ and $$\Delta $$G^o at T₂ (in kJ mol^–1) respectively, are close to :
[Use R = 8.314 J K^–1 mol^–1]

The number of Cl = O bonds in perchloric acid is, "________".