Which of the following statements is incorrect

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 a closed system
D. The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system

Answer

C

Explanation

If a closed reaction vessel is made of copper, it will work as closed system because in such system heat will be exchanged with the surroundings but no matter will exchange.