MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesPrevious Year Questions

Amongst the following, select the element having highest ionisation enthalpy. (MHT CET 2014)

A.Sodium

B.Potassium

C.Beryllium✓ Correct

D.Magnesium

Explanation

Ionisation enthalpy increases on moving from left to right in a period and decreases on moving down in a group. Thus, order of ionisation enthalpy is Be > Mg > Na > K

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