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NEET UG CHEMISTRY MCQ: SOLUTIONS
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Analyzing
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Evaluate the following statements for their correctness.
A. The elevation in boiling point temperature of water will be same for and urea
B. Azeotropic mixture boil without change in their composition.
C. Osmosis always takes place from hypertonic to hypotonic solution.
D. The density of solution having molarity 4.09 M is approximately
E. A negatively charged sol is obtained when solution is added to silver nitrate solution.
Choose the correct answer from the options given below.
A. The elevation in boiling point temperature of water will be same for and urea
B. Azeotropic mixture boil without change in their composition.
C. Osmosis always takes place from hypertonic to hypotonic solution.
D. The density of solution having molarity 4.09 M is approximately
E. A negatively charged sol is obtained when solution is added to silver nitrate solution.
Choose the correct answer from the options given below.
View answer and explanation
Correct option: D
B and D only
Options B and D are correct. Azeotropic mixtures do boil without changing composition, and the density of the H2SO4 solution is approximately 1.26 g/mL. The other statements are incorrect.
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Assertion: Isotonic solutions don't show net phenomenon of osmosis.
Reason: Isotonic solutions have equal osmotic pressure at constant temperature. 0.2 molal aqueous solution of a monobasic acid is 60% ionised. If Kb for water is then the boiling point of the solution will be The vapour pressures of pure liquids and are 400 and 600 mmHg, respectively at 298 K. On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquid is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components and in vapour phase, respectively are What is molecular weight of a substance whose 7.0% by mass solution in water freezes at . for water is A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. the vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be
Reason: Isotonic solutions have equal osmotic pressure at constant temperature. 0.2 molal aqueous solution of a monobasic acid is 60% ionised. If Kb for water is then the boiling point of the solution will be The vapour pressures of pure liquids and are 400 and 600 mmHg, respectively at 298 K. On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquid is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components and in vapour phase, respectively are What is molecular weight of a substance whose 7.0% by mass solution in water freezes at . for water is A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. the vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be