JEE Main · 2022 · 26 Jul 2022 · Shift 1 · s-Block Elements

More JEE Main questions on s-Block Elements

1. The type of oxide formed by the element among $\mathrm{Li},\mathrm{Na},\mathrm{Be},\mathrm{Mg},\mathrm{B}$ and Al that has the least atomic radius is :
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2. The ${\mathrm{F}}^{-}$ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.
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3. Number of metal ions characterized by flame test among the following is ____.
   ${\mathrm{Sr}}^{2+},{\mathrm{Ba}}^{2+},{\mathrm{Ca}}^{2+},{\mathrm{Cu}}^{2+},{\mathrm{Zn}}^{2+},{\mathrm{Co}}^{2+},{\mathrm{Fe}}^{2+}$
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4. The setting time of Cement is increased by adding
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5. Ion having highest hydration enthalpy among the given alkaline earth metal ions is:-
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6. Structure of ${\mathrm{BeCl}}_2$ in solid state, vapour phase and at very high temperature respectively are :-
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