Select an incorrect statement relating to a carnot cycle operating on a gas. a) each process is a reversible process. b) work occurs for all four processes. c) there are two adiabatic processes. d) there are two constant-pressure processes.

B)

D)

Explanation:

Carnot cycle ;

  This is the ideal cycle for all type of heat engine.All the process in the Carnot cycle is reversible processes ( those process does not leave any effect on the system as well as surrounding when the process is  reversed  is known as reversible process).It have four process in which two process is constant temperature and other two is isentropic or we can say that reversible adiabatic.

In the two process(constant temperature) only heat interaction take places and other two process(adiabatic) only work interaction take places.

So the option B and D is incorrect for Carnot cycle.

conservation of mass

mass before something happens = mass afterwards