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Q.

Ionisation energy values of an atom are 495,767, 1250 and 4540 kJ mole^-1 the formula of its sulphate is

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a

$M {({SO}_{4})}_{2}$

b

$M_{2} {SO}_{4}$

c

$M_{2} {({SO}_{4})}_{3}$

d

${MSO}_{4}$

answer is C.

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Detailed Solution

There is a large jump in the value after third I.E. Hence valency of metal is +3.

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Ionisation energy values of an atom are 495,767, 1250 and 4540 kJ mole-1 the formula of its sulphate is