Which of the following statements is correct?

Options

A. The presence of reacting species in a covered beaker is an example of open system
B. There is an exchange of energy as well as matter between the system and the surroundings in a closed system
C. The presence of reactants in a closed vessel made up of copper is an example of closed system
D. The presence of reactants in a thermos flask or other closed insulated vessel is an example of a closed system

Answer

C

Explanation

For a closed vessel made up of copper, no matter can be exchanged between the system and the surrounding but energy exchange can occur through its walls