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Class 12 · Chemistry · Easy
→If the mole fraction of solute is 0.1 and the total number of moles is 2, how many moles of solute are present?
Class 12 · Chemistry · Easy
→If the relative lowering of vapour pressure of a solution is 0.05, what is the mole fraction of solute in an ideal dilute solution?
Class 12 · Chemistry · Medium
→In the osmotic-pressure method, 1.5 g of solute is present in 500 mL of solution. If T = 300 K, π = 0.738 atm, and R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass?
Class 12 · Chemistry · Medium
→If a solute is completely non-dissociating but a student uses i = 2, what will happen to the molar mass calculation?
Class 12 · Chemistry · Medium
→What common principle is used in molar mass determination by both boiling-point elevation and freezing-point depression?
Class 12 · Chemistry · Medium
→If the actual molar mass of a solute is 60 g mol⁻¹ but the experimental value is 120 g mol⁻¹, which conclusion is suitable?
Class 12 · Chemistry · Medium
→If the actual molar mass of a solute is 180 g mol⁻¹ but the experimental value is 90 g mol⁻¹, which process is possible?
Class 12 · Chemistry · Easy
→If \(2\,\mathrm{g}\) of solute is present in a \(1\,\mathrm{L}\) solution and its molar mass determined by osmotic pressure is \(100\,\mathrm{g\,mol^{-1}}\), how many moles of solute are present?
Class 12 · Chemistry · Medium
→In molar-mass determination, if a solute dissociates into ions, which correction is required in the formula?
Class 12 · Chemistry · Medium
→If the osmotic pressure of one solution is greater than that of another at the same temperature, and both solutes are non-dissociating, what can be concluded about the first solution?
Class 11 · Chemistry · Easy
→If \(0.125\) mol of a solute has a mass of \(5\,\mathrm{g}\), what is its molar mass?
Class 12 · Chemistry · Easy
→If a \(0.5\,\mathrm{mol\,kg^{-1}}\) solution contains \(250\,\mathrm{g}\) of solvent, how many moles of solute are present?
Class 12 · Chemistry · Easy
→In the freezing-point-depression method, \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), \(\Delta T_f=0.93\,\mathrm{K}\), and the solute is non-dissociating. What is the molality?
Class 12 · Chemistry · Medium
→Under which condition is the molar mass obtained from a colligative-property measurement most reliable?
Class 12 · Chemistry · Easy
→When calculating molar mass by the osmotic-pressure method at \(27^\circ\mathrm{C}\), what temperature value should be used?
Class 12 · Chemistry · Medium
→What happens if \(w_A\) and \(w_B\) are interchanged in a molar-mass determination formula?
Class 12 · Chemistry · Medium
→The normal molar mass of a solute is \(90\,\mathrm{g\,mol^{-1}}\). If the van’t Hoff factor is \(i=3\), what will be the observed molar mass?
Class 12 · Chemistry · Easy
→If a 0.2 mol kg⁻¹ non-dissociating solution has K_f = 1.86 K kg mol⁻¹, what is the freezing-point depression?
Class 12 · Chemistry · Easy
→If the observed molar mass of a substance is double its normal value, what is the van’t Hoff factor?
Class 12 · Chemistry · Easy
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