The average degree of freedom per molecule of a gas is $6$. The gas performs $25\  J$ work, while expanding at constant pressure. The heat absorbed by the gas is   …. $J$

An air bubble doubles its radius on raising from the bottom of water reservoir to be the surface of water in it. If the atmospheric pressure is equal to $10\, m$ of water, the height of water in the reservoir is ….. $m$

When an air bubble of radius $‘r’$ rises from the bottom to the surface of a lake, its radius becomes $5r/4$ (the pressure of the atmosphere is equal to the $10 \,m$ height of water column). If the temperature is constant and the surface tension is neglected, the depth of the lake is …. $m$

Pressure versus temperature graph of an ideal gas of equal number of moles of different volume are plotted as shown in figure. Choose the correct alternative
 

Four moles of an ideal monoatomic gas undergoes a cyclic process $ABCA$ as shown in figure find ratio of temperature of $A$ and $B$ .