Start learning →

NEET UG Solutions — practice questions — page 3

Explore 125 free Solutions questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Solutions with Quill →

Solutions questions and exercises with answers

Showing questions 61–90 of 125.

Fractional distillation of a fermented ethanol and water mixture stops at roughly what ethanol content by volume?Read the answer and worked solution →Nitric acid and water form a maximum boiling azeotrope at about what HNO3 mass percentage?Read the answer and worked solution →Maximum boiling azeotropes come from which deviation?Read the answer and worked solution →Colligative properties of a dilute solution depend mainly on what?Read the answer and worked solution →Relative lowering of vapour pressure equals what?Read the answer and worked solution →Pure water is at 30 mm Hg. What is p with a non-volatile solute at x = 0.02?Read the answer and worked solution →6.0 g urea (60 g/mol) in 90 g water; pure water p = 25.0 mm Hg. Solution p?Read the answer and worked solution →36 g glucose (180 g/mol) in 500 g water (Kb 0.52). Boiling point rise?Read the answer and worked solution →2.0 g solute in 100 g benzene (Kb 2.53) raises bp by 0.506 K. Molar mass?Read the answer and worked solution →At the freezing point, which holds for solid and liquid phases?Read the answer and worked solution →62 g ethylene glycol (62 g/mol) in 500 g water, Kf = 1.86. Freezing point?Read the answer and worked solution →In osmosis, which way does solvent flow across the membrane?Read the answer and worked solution →Which of these is a synthetic semipermeable membrane?Read the answer and worked solution →Osmotic pressure is the excess pressure that must be applied to which side to stop osmosis?Read the answer and worked solution →For dilute solutions, osmotic pressure is directly proportional to which concentration term?Read the answer and worked solution →What is the osmotic pressure of a 0.10 M glucose solution at 300 K? (R = 0.083 L bar/mol K)Read the answer and worked solution →1.0 g protein in 100 mL gives 2.49 × 10^-3 bar at 300 K (R 0.083). Molar mass?Read the answer and worked solution →Normal saline, isotonic with the fluid inside blood cells, contains what mass/volume percentage of NaCl?Read the answer and worked solution →Blood cells placed in NaCl solution stronger than 0.9% (mass/volume) will do what?Read the answer and worked solution →A salt solution in which blood cells swell because water flows into them is called what?Read the answer and worked solution →Why does a raw mango shrivel in strong brine?Read the answer and worked solution →Reverse osmosis is used chiefly for which practical purpose?Read the answer and worked solution →What does the van't Hoff factor i account for?Read the answer and worked solution →If a solute dissociates, its measured molar mass is what?Read the answer and worked solution →Ethanoic acid dimerises almost completely in benzene. What is its approximate van't Hoff factor?Read the answer and worked solution →Solute molecules such as acid dimers associate in which solvents?Read the answer and worked solution →For a solute that associates in solution, the van't Hoff factor i is what?Read the answer and worked solution →What is the van't Hoff factor of K2SO4 on complete dissociation?Read the answer and worked solution →Ideally, how much does 1 mol KCl in 1 kg water raise the boiling point? (Kb 0.52)Read the answer and worked solution →Assuming complete dissociation, what is the freezing point depression of 0.10 m aqueous NaCl? (Kf = 1.86 K kg/mol)Read the answer and worked solution →

Worked practice questions

Fractional distillation of a fermented ethanol and water mixture stops at roughly what ethanol content by volume?

  1. 68%
  2. 100%
  3. 95%
  4. 50%
Show answer and solution

Correct answer: C. 95%

Ethanol and water form a minimum boiling azeotrope at about 95 percent ethanol by volume, beyond which no further separation occurs.

Open this question →

Nitric acid and water form a maximum boiling azeotrope at about what HNO3 mass percentage?

  1. 32%
  2. 95%
  3. 68%
  4. 50%
Show answer and solution

Correct answer: C. 68%

The nitric acid and water azeotrope is roughly 68 percent HNO3 and 32 percent water by mass, boiling at 393.5 K.

Open this question →

Maximum boiling azeotropes come from which deviation?

  1. No deviation at all
  2. Large positive deviation
  3. Large negative deviation
  4. Small positive deviation
Show answer and solution

Correct answer: C. Large negative deviation

A large negative deviation lowers vapour pressure, so the mixture boils at a maximum temperature at one composition.

Open this question →

How to practise

  1. Choose a Solutions question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Solutions practice for NEET UG. Read explanations as you go. No signup form needed to start.

Practise Solutions →

More Chemistry topics

Amines and BiomoleculesChemical KineticsAldehydes, Ketones and Carboxylic AcidsEquilibriumRedox ReactionsHydrocarbonsChemical Bonding and Molecular StructureStructure of Atom