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Class 12 · Chemistry · Easy
→If van’t Hoff factor i > 1, which situation is generally present?
Class 12 · Chemistry · Easy
→Van’t Hoff factor i is used for which correction?
Class 12 · Chemistry · Easy
→When solute particles associate to form larger groups, how is the observed molecular mass affected?
Class 12 · Chemistry · Easy
→What happens to the observed molecular mass when solute particles dissociate into more particles in solution?
Class 12 · Chemistry · Easy
→When is abnormal molecular mass usually observed?
Class 12 · Chemistry · Medium
→What is the best exam strategy while determining the molar mass of an unknown solute?
Class 12 · Chemistry · Easy
→If the relative lowering of vapour pressure is 0.02 and solute moles are very small compared with solvent moles, what is the approximate mole fraction of solute?
Class 12 · Chemistry · Easy
→In molar mass determination, the condition of a non-volatile solute is most directly connected with which method?
Class 12 · Chemistry · Medium
→If a substance repeatedly gives a higher molar mass by the cryoscopic method, which test idea is useful?
Class 12 · Chemistry · Easy
→A solute has true molar mass 120 g mol−1 and i = 1.5. What is the apparent molar mass?
Class 12 · Chemistry · Easy
→A student uses 27 K instead of 27 °C in the osmotic-pressure method. How will the calculated molar mass compare with the correct value?
Class 12 · Chemistry · Easy
→If the value of K_b is mistakenly taken as double, how will the molar mass calculated from boiling-point elevation change?
Class 12 · Chemistry · Medium
→Why is comparing results from different colligative properties useful for accurately determining the molar mass of an unknown solute?
Class 12 · Chemistry · Medium
→Why does the reliability of simple colligative formulas decrease if the solution is too concentrated during molar mass determination?
Class 12 · Chemistry · Medium
→Three grams of a solute dissolved in 100 g of solvent produces a freezing-point depression of 0.3 K. What depression will be produced by 6 g of the same solute in 100 g of the same solvent?
Class 12 · Chemistry · Hard
→In molar-mass determination, under which condition will the value calculated from M = wRT/(πV) be higher than the true value?
Class 12 · Chemistry · Hard
→If osmotic pressure increases due to factor (i), what is the corrected form of the osmotic-pressure relation?
Class 12 · Chemistry · Hard
→What problem occurs in molar-mass determination by relative lowering of vapour pressure if the solute is also volatile?
Class 12 · Chemistry · Medium
→If the solute sample contains an impurity during molar-mass determination, what is the usual effect?
Class 12 · Chemistry · Medium
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