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Class 12 · Chemistry · Medium
→In the vapour-pressure-lowering method, the relative lowering for a dilute solution is approximately equal to what?
Class 12 · Chemistry · Easy
→If the solute is non-volatile, which law is useful for determining molar mass from lowering of vapour pressure?
Class 12 · Chemistry · Easy
→Which colligative property can be measured at room temperature for molar mass determination?
Class 12 · Chemistry · Easy
→If two solutions are isotonic, which statement about them is correct?
Class 11 · Chemistry · Easy
→If 0.2 g of a substance is dissolved in 100 mL of solution, what volume V in litres should be used in the osmotic-pressure method?
Class 12 · Chemistry · Easy
→Which relation gives the number of moles from mass during molar mass determination?
Class 12 · Chemistry · Easy
→If the mass of solvent is given in grams, into which unit should it be converted before calculating molality?
Class 12 · Chemistry · Easy
→In molar-mass determination using boiling-point elevation, K₍b₎ is a property of which substance?
Class 12 · Chemistry · Easy
→In molar-mass determination using freezing-point depression, K₍f₎ is a property of which substance?
Class 12 · Chemistry · Easy
→In a solution, 0.5 g of solute corresponds to 0.005 mol. What is the molar mass of the solute?
Class 12 · Chemistry · Easy
→A nonelectrolyte solution has a boiling-point elevation, \(\Delta T_b=0.052\,K\), and the ebullioscopic constant is \(K_b=0.52\,K\,kg\,mol^{-1}\). What is the molality of the solution?
Class 12 · Chemistry · Easy
→A nonelectrolyte solution has a freezing-point depression, \(\Delta T_f=0.186\,K\), and the cryoscopic constant is \(K_f=1.86\,K\,kg\,mol^{-1}\). What is the molality of the solution?
Class 12 · Chemistry · Easy
→If 2 g of a solute contains 0.02 mol, what is its molar mass?
Class 12 · Chemistry · Easy
→If 1 g of a solute dissolved in 100 g of solvent forms a 0.1 m solution, what is the molar mass of the solute?
Class 12 · Chemistry · Easy
→Why may acetic acid show a higher observed molar mass in benzene?
Class 12 · Chemistry · Easy
→Why may the observed molar mass of NaCl be lower than its true molar mass during molar mass determination?
Class 12 · Chemistry · Easy
→Which solute will show normal colligative behaviour during molar mass determination?
Class 12 · Chemistry · Easy
→If the normal molar mass is 60 g mol⁻¹ and the observed molar mass is 120 g mol⁻¹, what is the van’t Hoff factor i?
Class 12 · Chemistry · Easy
→If the observed molar mass of a substance is 60 g mol⁻¹ and its normal molar mass is 120 g mol⁻¹, what is the van’t Hoff factor i?
Class 12 · Chemistry · Easy
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