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Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryWhen 4 g of a solute is dissolved in 500 g of water, the freezing-point depression is 0.186 K. If the solute is an AB-type solute that dissociates by 50%, what is its true molar mass? Take Kf for water as 1.86 K kg mol⁻¹.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Hard ChemistryA substance forms trimers. If its van’t Hoff factor is i = 0.6, what is the degree of association?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA solute forms dimers. Its true molar mass is 60 g mol⁻¹, while its observed molar mass is 80 g mol⁻¹. What is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16Medium ChemistryThe true molar mass of CaCl₂ is 111 g mol⁻¹. If its observed molar mass is 55.5 g mol⁻¹, what is the degree of dissociation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryIf the observed molar mass of an AB-type solute is 5/8 of its true molar mass, what is the degree of dissociation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryIf the true molar mass of NaCl is 58.5 g mol⁻¹ and the colligative-property method gives an observed molar mass of 39 g mol⁻¹, what is the approximate van’t Hoff factor, i?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA solute has a true molar mass of \(120\,\mathrm{g\,mol^{-1}}\), but its observed molar mass is \(240\,\mathrm{g\,mol^{-1}}\). What is the most suitable conclusion?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryThe true molar mass of a solute is \(180\,\mathrm{g\,mol^{-1}}\), but a colligative-property measurement gives an apparent molar mass of \(90\,\mathrm{g\,mol^{-1}}\). What is the value of the van’t Hoff factor \(i\)?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryA \(1\,\mathrm{L}\) solution is prepared from \(6\,\mathrm{g}\) of solute. Its osmotic pressure at \(300\,\mathrm{K}\) is \(1.23\,\mathrm{atm}\). The solute is non-dissociating. What is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryWhen \(2\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(100\,\mathrm{g}\) of solvent, the boiling-point elevation is \(0.208\,\mathrm{K}\). If \(K_b=0.52\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryWhen \(3.2\,\mathrm{g}\) of a solute is dissolved in \(400\,\mathrm{g}\) of water, the depression in freezing point is \(0.186\,\mathrm{K}\). Taking \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA solution of volume \(500\,\mathrm{mL}\) is prepared using \(1.5\,\mathrm{g}\) of solute. Its osmotic pressure at \(300\,\mathrm{K}\) is \(0.615\,\mathrm{atm}\). If \(R=0.082\,\mathrm{L\,atm\,mol^{-1}\,K^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryWhen \(5\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(250\,\mathrm{g}\) of solvent, the boiling point rises by \(0.104\,\mathrm{K}\). If \(K_b=0.52\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryWhen \(2.4\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(200\,\mathrm{g}\) of water, the freezing point decreases by \(0.372\,\mathrm{K}\). If \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA \(0.001\,\mathrm{M}\) solution is prepared to determine the molar mass of a protein. Which measurement is most useful for such a very dilute solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA sample has a normal molar mass of \(98\,\mathrm{g\,mol^{-1}}\), but its experimentally determined molar mass is \(49\,\mathrm{g\,mol^{-1}}\). Which statement best explains this result?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryIn a molar mass experiment, \(\Delta T_b\) is found to be lower than expected. If the solute is an acid in an organic solvent, what is the probable reason?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryIn a molar mass determination experiment, \(\Delta T_f\) is found to be greater than expected. If the solute is an electrolyte, what is the most suitable reason?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryA solution has osmotic pressure \(1.23\,\mathrm{atm}\) at \(300\,\mathrm{K}\). If the concentration of the same solution is halved while the temperature remains \(300\,\mathrm{K}\), what will be the new osmotic pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Easy ChemistryWhich colligative property is most suitable for determining the molar mass of macromolecules such as proteins, which have very high molar masses?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium