Consider the elements Mg, Al,S,P and Si, the correct increasing order of their first ionisation enthalpy is:
Held on 24 Feb 2021 · Verified 6 Jul 2026.
Al<Mg<Si<S<P
Al<Mg<S<Si<P
Mg<Al<Si<P<S
Mg<Al<Si<S<P
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By usual analysis, 1.00 g of compound $(\mathrm{X})$ gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound $(X)$ is : (nearest integer) (Given, molar mass in $\mathrm{g} \mathrm{mol}^{-1}: \mathrm{O}=16, \mathrm{Mg}=24, \mathrm{P}=31$)
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