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NEET2018ChemistrySome Basic Concepts of ChemistryActual

Mixture of two bivalent metals A and B having mass 2 ~g when dissolved in HCl at STP, 2.24 ~L H ₂ is evolved. What is the mass of A present in mixture? (Atomic mass of A=15 u , B=30 u )

Options

  1. A1 ~g
  2. B1.5 ~g
  3. C0.5 ~g
  4. D0.75 ~g

Correct answer

A. 1 ~g

Step-by-step solution

A+2 HCl A Cl ₂+ H ₂ Mole : x 15 x 15 B+2 HCl BCl ₂+ H ₂ Mole : 2-x 30 2-x 30 Total moles of H ₂= x 15 + 2-x 30 = 2.24 22.4 = 1 10 x=1 ~g

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