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 6 of 6
- A. π = iCRT
- B. π = RCT/M
- C. π = nRT/V
- D. π = PV = nRT
Explanation: The correct relationship for the osmotic pressure of a dilute solution is given by the equation π = RCT/M.
Correct answer: π = RCT/M- A. 1 molar solution of urea
- B. 1 molar solution of glucose
- C. 1 molar solution of sodium chloride
- D. 1 molar solution of magnesium chloride
Explanation: The correct answer is the 1 molar solution of urea. Urea is a non-electrolyte, meaning it does not dissociate into ions in solution.
Correct answer: 1 molar solution of urea- A. Lower
- B. Variable
- C. Higher
- D. Remain the same
Explanation: The freezing point of a solution is generally lower compared to the freezing point of the pure solvent.
Correct answer: Lower- A. mole fraction of the solvaent
- B. Mole fraction of the solute
- C. Moles of a solvant
- D. Moles of the solvent
Explanation: According to Raoult's law, the relative lowering of vapor pressure is equal to the mole fraction of the solute in the solution.Raoult's…
Correct answer: Mole fraction of the solute- A. The hydrogen ion, H+
- B. The hydroxide ion, OH-
- C. The sodium ion, Na+ (aq)
- D. The sulphate ion, SO4-2 (aq).
Explanation: .Na+ ions will be present in the highest concentration since there are 2 moles of Na+ in each mole of Na2SO4, so the concentration of Na+…
Correct answer: The sodium ion, Na+ (aq)106. 2% solution by weight of sodium chloride solution is prepared. The molality of the solution is:
- A. 0.34 molal
- B. 0.25 molal
- C. 2 molals
- D. 0.02 mol
Explanation: 2% solution by weight means 2 grams of NaCl is dissolved per 100 grams of water. No.
Correct answer: 0.34 molal- A. 0.1
- B. 0.9
- C. 0.0177
- D. 1.0
Explanation: Explanation for this question will be added soon.
Correct answer: 0.1- A. 25
- B. 60.1
- C. 87.5
- D. 93.2
Explanation: The correct option is c 87.5 mL M1V1=M2V2 Where, M1⇒ Molarity of the initial solution = 3.5 M V1⇒ Volume of the initial solution = 50 mL…
Correct answer: 87.5- A. Conical flasks
- B. Beakers
- C. Volumetric flask
- D. Measuring cylinder
Explanation: Volumetric flasks, on the other hand, are specifically designed for accurate measurement of a specific volume and are the preferred choice…
Correct answer: Volumetric flask- A. 0.03
- B. 0.02
- C. 0.04
- D. 0.01
Explanation: 0.01: This option is correct. The ionic strength is equal to 0.01. In this case, the concentration of both the barium ions (Ba2+) and…
Correct answer: 0.01- A. 0.03
- B. 0.02
- C. 0.04
- D. 0.01
Explanation: We know that:Ionic strength (I) = ½ (m1z1² + m2z2²)Where,m1 = concentration of Ba2+ = 0.01m2 = concentration of Cl- = 0.01 × 2 = 0.02z1 =…
Correct answer: 0.03- A. 0.01 molal
- B. 0.1 molal
- C. 1.1 molal
- D. 1.0 molal
Explanation: Mass of ethanol (solute) = 2.3gMass of water (solvent) = 500gFirst, we need to convert the mass of ethanol to moles.
Correct answer: 0.1 molal- A. Move towards cathode
- B. Move towards anode
- C. React with water
- D. Remain neutral
Explanation: Sucrose molecules are electrically neutral, meaning they have an equal number of positive and negative charges.
Correct answer: Remain neutral- A. 0.15 M
- B. 1.5 M
- C. 0.75
- D. None
Explanation: The calculations are shown below : The chemical equation used in this titration is : HCl+KOH→KCl+H₂O In this chemical reaction, the molar…
Correct answer: 0.15 M- A. 0.1
- B. 10.0
- C. 1.0
- D. Zero
Explanation: The fundamental concept of mole fractions dictates that the sum of the mole fractions of all components in a solution, including both…
Correct answer: 1.0- A. 0.001 M
- B. 0.01 M
- C. 1.0 M
- D. 10.0 M
Explanation: To find the new concentration after dilution, use the formula M1V1 = M2V2.
Correct answer: 0.01 M- A. 0.4M
- B. 4M
- C. 0.2M
- D. 0.1M
Explanation: M = 4/40 / 250/1000 = 0.4,where 4g is the amount of NaOH, 40 is the grams per mole of NaOH, 250mL is the amount of water and 1000 is the…
Correct answer: 0.4M- A. 3.8 ppm
- B. 38 ppm
- C. 0.38 ppm
- D. 380 ppm
Explanation: The concentration of mercury is calculated by the formula:ppm = (mass of solute / mass of solution) x 106Given that you have 3.8 x 103g of…
Correct answer: 3.8 ppm- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Students should remember that a billion has 9 zeros so option C and D can be eliminated.
Correct answer: Option B