Q. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is

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Q. Pick out the correct statement.

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Q. Normality of a solution does not change with the increase in the

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Q. For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction)

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Q. Isotopes are atoms having the same

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Q. 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.

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Q. Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?

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Q. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

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Q. Disappearance of snow in subzero weather exemplifies the process of

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Q. 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 .

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Q. How much O₂ can be obtained from 90 kg of water ?

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Q. 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

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Q. 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 B is

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Q. In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

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Q. A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

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Q. __________ equation gives the effect of temperature on heat of reaction.

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Q. Which of the following has the smallest least effect on the solubility of a solute into the solvent ?

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Q. 1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.

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Q. Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).

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Q. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest ?

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