The first and second ionisation enthalpies of a metal are 496

Question:

The first and second ionisation enthalpies of a metal are 496 and $4560 \mathrm{~kJ} \mathrm{~mol}^{-1}$, respectively. How many moles of $\mathrm{HCl}$ and $\mathrm{H}_{2} \mathrm{SO}_{4}$, respectively, will be needed to react completely with 1 mole of the metal hydroxide ?

  1. 1 and $0.5$

  2. 2 and $0.5$

  3. 1 and 1

  4. 1 and 2


Correct Option: 1

Solution:

 

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