Calculate the temperature of gas if it obeys Van der Waals equation from the following data. A flask of 25 litre contains 10 mole of a gas under 50 atm . Given $a = 5.46\; atm \;litre^2mol^{-2}$ and $b = 0.031\;litre\;mol^{-1}$

Question

$(a)\;12.56^{\large\circ}C\qquad(b)\;1.256^{\large\circ}C\qquad(c)\;1256.93^{\large\circ}C\qquad(d)\;0.1256^{\large\circ}C$