Question

Two metals X and Y belong to the second group of periodic table. X forms insoluble oxide but soluble sulphate. Y forms a soluble oxide but insoluble sulphate. Hydroxide of metal X is soluble in NaOH while that of metal Y is insoluble in NaOH. What are metals X and Y?

• A. X = Be, Y = Ba
• B. X = Mg, Y = Ca
• C. X = Ca, Y = Sr
• D. X = Ba, Y = Mg

Answer 1

Answer: (A)

X = Be, Y = Ba

Answer 2

: BeO – Insoluble, $BeSO_{4}$ - Soluble

BaO – Soluble, $BaSO_{4} -$ Insoluble

$Be(OH)_{2} -$ Soluble in NaOH

$Ba(OH)_{2}$ - Insoluble in NaOH