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The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to
In the following question below some statements are given followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusions logically follows the given statements. Statements: No solution is mixture. Each solvent is solute. All solute are solution. Conclusions: I. No solvent is mixture. II. Some solution is solvent. III. Some solute is mixture. 
What is the enthalpy change of 8 mole solution if the enthalpy change of 5 mole solute is 10 J/mole, and enthalpy of 2 mole solvent is 15 J/mole?
Meena goes to a post office to post mail/letter and parcels. The postal rate is given below: Letter weighing i) 25 gram or less - Rs. 15 ii) Per every additional 20 gram Parcel weighing - Rs. 7 i) 60 gram or less - Rs. 55 ii) For every additional 50 gram - Rs. 15 Meena wants to send one letter of weight 20 gram and two parcels of each to 310 gram and 460 gram respectively. How much money Meena have to pay?
What is correct: (i) In a Gram Panchayat there can be more than one village. (ii) Meeting of Gram Sabha held in each village. (iii) Meeting of Gram Sabha held in the headquarter of Gram Panchayat. (iv) Meeting of Gram Panchayat held in each village. (v) Meeting of Gram Panchayat held in the headquarter of Gram Panchayat.
30 litres of salt solution contains 5% salt. How many litres of water must be added so as to get a resulted solution containing 3% salt? A. 20 litres B. 25 litres C. 30 litres D. 35 litres
A milk seller bought certain quantity of pure milk. He first sold 20 litres of pure milk. He added 20 litres of water to the remaining quantity of milk. He then sold 20 litres of the milk water mixture and added 20 litres of water to the mixture. He again sold 20 litres of this milk water mixture and added 20 litres of water to the mixture. Now, the ratio of milk to water is 8 : 19. How much quantity of pure milk in litres did he buy in the first place?
Two feeds, 10 mole with 5 J/mole and 20 mole with 15 J/mole, product contains two streams, 5 mole with 10 J/mole and P with 25 J/mole, what is the value of P?
Two feeds, 5 mole with 25 J/mole and F with 5 J/mole, product contains two streams, 5 mole with 10 J/mole and 10 mole with 15 J/mole, what is the value of F?