Successive ionisation energies of an element ‘M’ are 8.3, 25.1, 37.9, 259.3 and 340.1 ev. The formula of its bromide is

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MBr5

MBr4

MBr3

MBr2

answer is C.

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Detailed Solution

Difference between third and fourth IP values are more hence metal has valency 3

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