All Free Chemistry MCQs with Answers

• 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…

• 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.

• 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.

• 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.

• 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…

• 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+…

• 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.

• A. 0.1
• B. 0.9
• C. 0.0177
• D. 1.0

Explanation: Explanation for this question will be added soon.

• 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…

• 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…

• 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…

• 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 =…

• 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.

• 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.

• 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…

• 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…

• 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.

• 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…

• 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…

• 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.