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NEET2015ChemistrySome Basic Concepts of ChemistryActual

Assertion: One mole of NaCl contains 6.023 10²³ molecules of sodium chloride. Reason : 58.5 ~g of NaCl also contains 6.023 10²³ molecules of NaCl .

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIfboth assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

B. Ifboth assertion and reason are true but reason is not the correct explanation of assertion.

Step-by-step solution

Molar mass or mass of 1 mole of NaCl =23+35.5=58.5 ~g According to mole concept, 1 mole of molecules = Gram molecular mass =6.023 10²³ molecules 58.5 ~g of NaCl also contains 6.023 10²³ molecules of NaCl .

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