JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
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?
- A \(1\) and \(0.5\)
- B \(2\) and \(0.5\)
- C \(1\) and \(1\)
- D \(1\) and \(2\)
Answer & Solution
Correct Answer
(A) \(1\) and \(0.5\)
Step-by-step Solution
Detailed explanation
IE values indicate, that the metal belongs to Ist group since second IE is very high ( only one valence electron) Metal hydroxide will be of type, \(MOH\). \(\mathrm{MOH}+\mathrm{HCl} \rightarrow \mathrm{MCl}+\mathrm{H}_{2} \mathrm{O}\) \((1mol)\) \((1 \mathrm{mol})\)…
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