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

Options

  1. AP = Be, Q = Ba
  2. BP = Mg, Q = Ca
  3. CP = Ca, Q = Sr
  4. DP = Ba, Q = Mg

Correct answer

A. P = Be, Q = Ba

Step-by-step solution

BeO-Insoluble, B e S O 4 -Soluble BaO-Soluble, B a S O 4 -Insoluble B e O H 2 -Soluble in NaOH B a ( O H ) 2 -Insoluble in NaOH

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