Entropy of a system decreases .........

When you make ice cubes,the entropy of water

State the Kelvin-Planck statement of the second law of thermodynamics.

$100^{\circ} C$ temperature wala ek garam tambe ka tukda $30^{\circ} C$ temperature wale talab mein dala jata hai. Tamba thanda hokar $30^{\circ} C$ par aa jata hai,jabki talab bahut bada hone ke karan apne prarambhik taapman par bana rehta hai. Tab,

The graphs below show the entropy versus energy $U$ of two systems $1$ and $2$ at constant volume. The initial energies of the systems are indicated by $U_{1, i}$ and $U_{2, i}$,respectively. The graphs are drawn to the same scale. The systems are then brought into thermal contact with each other. Assume that,at all times,the combined energy of the two systems remains constant. Choose the most appropriate option indicating the energies of the two systems and the total entropy after they achieve equilibrium.

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