Free Solutions and Colloids MCQs with Answers
119 Solutions and Colloids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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Read the Solutions and Colloids notesFree MDCAT chapter notes with key terms119 questions · page 5 of 6
- A. 0.1(N) Zn(NO3)2
- B. 0.1(N) Na3PO4
- C. 0.1(N) ZnSO4
- D. 0.1(N) AlCl3
Explanation: More the valency of cation greater will be its coagulating power as per hardy schulze rule.
Correct answer: 0.1(N) AlCl3- A. 0.25
- B. 25
- C. 250
- D. 2.5
Explanation: 250 mg of X is present in 100 ml of colloidal sol of gold. By definition, gold no.
Correct answer: 25- A. Convection currents in the fluid
- B. Unequal bombardments by the molecules of the dispersion medium on colloidal particles.
- C. Setting of dispersed phase under gravity.
- D. Thermal gradient in the medium.
Explanation: Unequal bombardments of solvent particles on colloidal particles cause zigzag motion.
Correct answer: Unequal bombardments by the molecules of the dispersion medium on colloidal particles.- A. 0. 025
- B. 0.25
- C. 2.5
- D. 250
Explanation: According to the definition of gold number, in this case starch has gold number of 250.
Correct answer: 250- A. 40
- B. 20
- C. 60
- D. 80
Explanation: The minimum amount of lyophilic colloid in mg which prevents the coagulation of 10 ml gold sol by 1 ml of 10% NaCl solution.
Correct answer: 40- A. A solution freezes at a lower temperature than the pure solvent
- B. A solution boils at a higher temperature than the pure solvent.
- C. 0.1 M NaCl solution and 0.1 m sugar solution have the same boiling point
- D. Osmosis cannot take place without a semi-permeable membrane.
Explanation: Molarity is the moles of solute in 1 litre of solution Molality is the moles of solute per 1 kg of solvent.
Correct answer: 0.1 M NaCl solution and 0.1 m sugar solution have the same boiling point- A. decreases
- B. increases
- C. neither decreases nor increases
- D. none
Explanation: The presence of common ions in a solution can affect the solubility of a slightly soluble ionic compound.
Correct answer: decreases- A. Extensive
- B. Intensive
- C. Colligative
- D. Physical
Explanation: The explanation for this question will be added soon.
Correct answer: Colligative- A. Homogenous mixture
- B. Colloid
- C. Belong to the same state of matter
- D. All of the above
Explanation: The explanation for this question will be added soon.
Correct answer: Homogenous mixture- A. Energy of solution
- B. Enthalpy
- C. Energy of solvation
- D. None of the above
Explanation: The explanation for this question will be added soon.
Correct answer: Energy of solvation91. Which term describes a solution in which dissolved solute is in equilibrium with undissolved solute?
- A. Dilute
- B. Saturated
- C. Unsaturated
- D. Supersaturated
Explanation: A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the…
Correct answer: Saturated- A. Immiscible
- B. Highly soluble
- C. Insoluble
- D. Partially soluble
Explanation: There are three essential plant nutrients for healthy growth: nitrogen (N), phosphorous (P), potassium (K).
Correct answer: Highly soluble- A. Obligative.
- B. Fractional.
- C. Colligative
- D. Automated.
Explanation: Osmotic pressure is a 'colligative' property, like freezing point depression, which means that it depends on the number of particles in…
Correct answer: Colligative- A. 1
- B. 2
- C. 3
- D. 4
Explanation: Pure water (with the highest vapor pressure) will boil at the lowest temperature.Boiling occurs when vapor pressure = external…
Correct answer: 1- A. 36.5 g/mol
- B. 38.0 g/mol
- C. 100 g/mol
- D. 11.73 g/mol
Explanation: Explanation:Ar of H is 1 and Ar of Cl is 35.5. Mr = 35.5 + 1 = 36.5 g/mol
Correct answer: 36.5 g/mol- A. 5.65
- B. 7.69
- C. 5.20
- D. 4.11
Explanation: A is correct since the solution is given asGiven: Water = 103 g(1 kg), Oxygen = 5.65 x 10-3 gRequired : Oxygen in ppm = ?Formula : Ppm =…
Correct answer: 5.65- A. 0.2 M urea
- B. 0.1 M Glucose
- C. 0.1 M MgSO4
- D. 0.1 M BaCl2
Explanation: The higher the vanthoff factor, the greater the lowering of vapor pressure.
Correct answer: 0.1 M BaCl2- A. 15.2 torr
- B. 17.8 torr
- C. 23.8 torr
- D. 29.7 torr
Explanation: Mole fraction of the solute = xs = 0.25Pressure of the solvent = PH2O = 23.76 torrFirst, we solve for the mole fraction of the…
Correct answer: 17.8 torr- A. No change in its freezing point and boiling point
- B. Freezing point increases and boiling point decreases.
- C. Freezing point increases and boiling point increases
- D. Freezing point decreases and boiling point increases
Explanation: The presence of impurities in a substance lowers the melting point but increases the boiling point of the substance.
Correct answer: Freezing point decreases and boiling point increases- A. π = nRT/V
- B. π = PRT
- C. π = CRT
- D. π = PV=nRT
Explanation: The correct formula for the osmotic pressure of a dilute solution is π = CRT, where:C is the molar concentration of the solute.R is the…
Correct answer: π = CRT