The distance between an object and a screen is 100cm. A lens can be produce real image of the object on the screen for two different positions between the screen and the object. The distance between these two positions is 40cm. if the power of the lens is close to where N is an integer, the value of N is_______-
Option: 1 476
Option: 2 320
Option: 3 570
Option: 4 678
5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K
A capacitor is made of two square plates each of side 'a' making a very small angle
A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The leftover organic phase was extracted with d