151. The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately
152. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
153. The value of (Cp - Cv)for a real gas obeying Vander Wall's equation is
154. A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO2, 0.05 gm mole of oxygen and 0.80 gm mole of N2. What is its molecular weight ?
155. A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is
156. For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction)
157. Isotopes are atoms having the same
158. 500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.
159. Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?
160. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?
161. The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
162. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is
163. For an ideal gas, the compressibility factor
164. Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.
165. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent ?
166. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
167. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
168. Disappearance of snow in subzero weather exemplifies the process of
169. A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2 ; then the partial pressure of N2 in the mixture will be __________ kgf/cm2 .
170. How much O2 can be obtained from 90 kg of water ?
171. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is
172. A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
173. The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is __________ kg mole.
174. Addition of a non-volatile solute to a pure solvent
175. The depression in freezing point of a solution is