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Q.

Which of the following have no unit ?
(I) Electronegativity
(II) Electron gain enthalpy
(III) Ionisation enthalpy
(IV) Metallic character

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a

I and II 

b

I and IV 

c

II and III 

d

III and IV 

answer is B.

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Detailed Solution

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Electronegativity and metallic character have no units while electron gain enthalpy and ionisation enthalpy have units of kJ mol-1.

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