When you make ice cubes,the entropy of water

An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is $S_{1}$ and that of the other part is $S_{2}$. Given that $S_{1} > S_{2}$. If the piston is removed,then the total entropy of the system will be:

“Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement or consequence of

Can the whole of heat be converted into work?

Which of the following is a $FALSE$ statement?

$Assertion :$ In an isolated system,the entropy increases.
$Reason :$ The processes in an isolated system are adiabatic.