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JEE Main20206 Sep 2020Evening ShiftChemistrySome Basic Concepts of ChemistryActual

The average molar mass of chlorine is 35 . 5 g mol - 1 . The ratio of Cl 35 to Cl 37 in naturally occurring chlorine is close to :

Options

  1. A4   :   1
  2. B3   :   1
  3. C2   :   1
  4. D1   :   1

Correct answer

B. 3   :   1

Step-by-step solution

35 CI 37 CI Molar   ratio x 1 − x M avg . = 35 × x + 37 1 − x = 35 .5 35 x + 37 − 37 x = 35 .5 2 x = 1 .5 x = 3 4 So, ratio of 35 CI : 37 CI = 3 : 1

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