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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

One mole of magnesium in the vapour state absorbed 1200 KJ of energy. and . In the final composition of the mixture, find the % of ion, considering the stability of in vapour phase.

Answer: 69

Solution

Since 1200 kJ exceeds the energy for full first ionisation (750 kJ for all of it) but is less than what full double ionisation would need (2200 kJ), all the gas ionises at least once ( being favoured/formed

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Question ID VK-135345