24752. The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be
24753. 80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is
24754. Atmospheric pressure corresponds to a hydrostatic head of
24755. At a temperature of 0°K, the molecules of a gas have only __________ energy.
24756. A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be
24757. "The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface". This statement pertaining to the solubility of gases in liquid is the __________ law.
24758. If 1 Nm3 of O2 contains 'N' number of molecules, then number of molecules in 2Nm3 of SO2 will be
24759. The most convenient way of expressing solution concentration is in terms of
24760. ------vitamin is synthesized by rumen micro flora
24761. Internal quality of egg can be examined using
24762. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of
24763. pH value of a solution containing 1 gm of hydrogen ion per litre will be
24764. Claussius Clapeyron equation applies to the __________ process.
24765. __________ chart is a graph related to Antonie equation.
24766. Degrees of freedom will be equal to the number of components for a system comprising of
24767. A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container
24768. Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is
24769. Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature ?
24770. What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?
24771. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is __________ gm.
24772. The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.
24773. Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules
24774. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the
24775. Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity ? Vapour pressure of water at 20°C is 17.5 mm Hg.
24776. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to
24777. As per Kirchoff s equation, the heat of reaction is affected by the
24778. In a chemical process, the recycle stream is purged for
24779. The viscosity of water at room temperature may be around one
24780. A flowsheet is given in the following figure:
If the single pass once through conversion of A to B is 20%, then the rate of recycle R (molds/hr) is
24781. The heat capacity of most substances is greater for the __________ state.
24782. The temperature at which real gases obey the ideal gas law over a wide range of pressure is called the __________ temperature.
24783. Elements in a periodic table are arranged in order of their
24784. For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
24785. The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal __________ in the two phases.
24786. If a solution of eutectic composition is cooled, __________ reaching the eutectic temperature.
24787. Which of the following is not a unit of length ?
24788. The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
24789. The equilibrium data of component A in the two phases B and C are given below.
The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is
24790. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pvB and pvw respectively. The partial pressure of benzene in air-vapour mixture is
24791. pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be
24792. The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is
24793. The total number of atoms in 8.5 gm of NH3 is __________ x 1023.
24794. The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.
24795. Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be __________ atmosphere.
24796. In general, the specific heats of aqueous solutions __________ with increase in the concentration of the solute.
24797. The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the
24798. The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is
24799. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal