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KVPY2017ChemistrySome Basic Concepts of Chemistry

Xg of Ca [atomic mass =40 ] dissolves completely in concentrated HCl solution to produce 5.04 ~L of H ₂ gas at STP. The value of X is closest to

Options

  1. A4.5
  2. B8.1
  3. C9.0
  4. D16.2

Correct answer

C. 9.0

Step-by-step solution

array lr Ca +2 HCl CaCl ₂+ H ₂( ~g ) x 40 & 5.04 22.4 x 40 = 5.04 22.4 x =9 array

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