• # question_answer At $25{}^\circ C$ the vapour pressure of pure liquid A (mol. wt. = 40) is 100 torr and that of pure liquid B (mol. wt. =80) is 60 torr. Find the vapour pressure of solution at $25{}^\circ C$ if the mole ratio of A and B in vapour phase is 2 : 3. A)  60.3 torr                      B)  65.7 torr C)  71.42 ton-                   D)  None of these

$e=-\frac{\Delta \phi }{\Delta t}$ $=\frac{0.25\times {{10}^{-3}}Wb}{0.05\,s}=5\times {{10}^{-3}}V$ $=100\,\left( \frac{\Delta \phi }{\Delta t} \right)$