The osmotic pressure of CaCl2 and urea solutions of the same concentration at the same temperature are respectively 0.605 atmand 0.245 aim. Calculate van't Hoff factor for `CaCl_2`.

A steel tank holds 0.2 m^3 of air at a pressure of 5 atm. The volante of air that would occupy at the same temperature but at a pressure l atom is

We have three aqueous solutions of NaCl labelled as A, B and C with concentrations 0.1M, 0.01M and 0.001M, respectively. The value of van't Hoff factor for these solutions will be in the order

3.4g of a gas at 17^@C occupied sam e volume as 0.16 gram of H_2 at the same temperature and pressure Molecular mass of the gas is

When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the cut-offf voltage and the saturation current are respectively 0.4 V and 12 mA. If the same source is placed 0.4 m away from the photoelectric cell, then

3.4 g of CaCl_2 is dissolved in 2.5 L of water at 300 K. What is the osmotic pressure of the solution? van't Hoff factor for CaCl_2 is 2.47. (Ca = 40, Cl =35.5)

Two concentric circular coils of five turns each are situated in the same plane. Their radii are 20 cm and 30 cm and they carry respectively 0.2 A and 0.3 A current in same direction. The magnetic field in tesla at the centre is

The rate law for the reaction C_2H_4Br_2+3I^- rarr C_2H_4+2Br^-+I_3^- is rate = k[C_2H_4Br_2] [I^-] . The rate of the reaction is found to be 1.1xx10^(-4)M//s when the concentrations of C_2H_4Br_2 and I^- are 0.12M and 0.18M respectively. Calculate the rate constant of the reaction.