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NEETChemistryThermodynamics (C)

Given below are two statements: Statement I : In an isolated system there is no exchange of energy but exchange of matter is possible between system and the surroundings. Statement II : The presence of reactants in a thermous flask is an example of an isolated system. In the light of the above statements, choose the most appropriate answer from the options given below :

Options

  1. ABoth statement I and statement II are incorrect.
  2. BStatement I is correct but statement II is incorrect
  3. CStatement I is incorrect but statement II is correct.
  4. DBoth statements I and statements II are correct.

Correct answer

C. Statement I is incorrect but statement II is correct.

Step-by-step solution

- Statement I: In an isolated system, neither energy nor matter is exchanged with the surroundings. The statement is incorrect because it suggests that only energy is not exchanged, but matter can be, which is not true for an isolated system. - Statement II: The presence of reactants in a thermos flask is indeed an example of an isolated system because the flask is designed to prevent the exchange of both energy and matter with the surroundings. This statement is correct.

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