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NEET2002ChemistrySome Basic Concepts of ChemistryActual

Assertion : Atoms can neither be created nor destroyed. Reason : Under similar condition of temperature and pressure, equal volume of gases does not contain equal number of atoms.

Options

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

Correct answer

C. If the assertion is true but the reason is false.

Step-by-step solution

Atoms can neither be created nor destroyed. This is the statement of law of conservation of mass. Under similar conditions of temperature and pressure, equal volume of gases contain equal number of atoms. As, P V=n R T (Ideal gas equation) If, for Ist case, for IInd case, aligned & P₁ V₁=n₁ R T₁ & P₂ V₂=n₂ R T₂ aligned P₁ V₁ P₂ V₂ = n₁ R T₁ n₂ R T₂ n₁=n₂ ( P₁,=P₂, V₁=V₂, T₁=T₂ )

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