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Q.

The first,second and third ionization enthalpies of a metal (M) are respectively 417,3069 and 4059 kJ/mole. The correct formulae of the compound formed by the metal among the following  is 

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a

M3(CO2)2

b

M2N3

c

M2O3

d

MOH

answer is C.

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Detailed Solution

The large gap between first and second ionization enthalpies indicates that the valency electronic configuration of metal is ns1

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