Which of the following statement 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 systemm and the surroundings in a closed systemm
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

Presence of reacting species in a covered beaker-closed system. Exchange of matter as well as energy-Open system Presence of reactant in a closed vessel-Closed system Presence of reactants in thermos flask-Isolated system.