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Question

The energy required for the ionisation of 0.02 gram atom of magnesium is x kJ. The amount of energy required to ionise 1 atom of magnesium is:

A
x kJ
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B
x0.02NAJ
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C
x×1030.02NAJ
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D
xNAkJ
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Solution

The correct option is C x×1030.02NAJ
Molecular mass of Mg=24
no. of moles =0.0224×100=11200
no. of atoms =NA1200
(NA1200) atoms require energy x by (given)
Energy to ionise 1 atom =x(NA1200)kJ
=x×103(NA)(11200)J
=x×1030.02NA Joules

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