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Solutions

CBSE Class 12 · Chemistry · 29 past questions

  1. Q1 2026
    When 1.5 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point of benzene got raised…
  2. Q2 2026
    Which of the following solutions will have the lowest freezing point in water ?
  3. Q3 2026
    Calculate the boiling point of a solution containing 0.61 g of benzoic acid (Molar mass = 122 g mol$^{-1}$)…
  4. Q4 2026
    The boiling point of an azeotropic mixture of water and ethanol is less than that of pure water and ethanol.…
  5. Q5 2026
    The mole fraction of a solute in 2·0 molal aqueous solution is…
  6. Q6 2026
    An antifreeze solution is prepared by dissolving 31 g of ethylene glycol (Molar mass = 62 g mol$^{-1}$) in…
  7. Q7 2025
    The value of Henry's constant K$_H$ is…
  8. Q8 2025
    An aqueous solution of NaOH was made and its molar mass from the measurement of osmotic pressure at 27°C was…
  9. Q9 2025
    At 25 °C the saturated vapour pressure of water is 24 mm Hg. Find the saturated vapour pressure of a 5%…
  10. Q10 2025
    In case of association, abnormal molar mass of solute will
  11. Q11 2025
    An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because __________.
  12. Q12 2025
    A solution of glucose (molar mass = 180 g mol$^{-1}$) in water has a boiling point of 100.20 °C. Calculate…
  13. Q13 2024
    An azeotropic solution of two liquids has boiling point lower than either of them when it…
  14. Q14 2024
    The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0225. The…
  15. Q15 2024
    A 6% solution of glucose (molar mass = 180 g mol⁻¹) is isotonic with 2.5% solution of an unknown organic…
  16. Q16 2024
    The vapour pressure of a solvent at 283 K is 100 mm Hg. Calculate the vapour pressure of a dilute solution…
  17. Q17 2024
    A 1% solution of solute 'X' is isotonic with a 6% solution of sucrose (molar mass = 342 g mol^-1). The molar…
  18. Q18 2024
    For Questions number 13 to 16, two statements are given — one labelled as Assertion (A) and the other…
  19. Q19 2024
    A solution is prepared by dissolving 5 g of a non-volatile solute in 200 g of water. It has a vapour pressure…
  20. Q20 2024
    For an electrolyte undergoing association in a solvent, the van't Hoff factor…
  21. Q21 2024
    For Questions number 13 to 16, two statements are given — one labelled as Assertion (A) and the other…
  22. Q22 2023
    Value of Henry's constant K$_H$…
  23. Q23 2023
    The vapour pressure of pure liquid X and pure liquid Y at 25 °C are 120 mm Hg and 160 mm Hg respectively. If…
  24. Q24 2023
    When 19.5 g of $F - CH_2 - COOH$ (Molar mass = 78 g mol$^{-1}$), is dissolved in 500 g of water, the…
  25. Q25 2023
    An azeotropic mixture of two liquids has a boiling point higher than either of the two liquids when it…
  26. Q26 2023
    Which of the following colligative property is used to find the molar mass of proteins ?
  27. Q27 2023
    0.3 g of acetic acid (M = 60 g mol$^{-1}$) dissolved in 30 g of benzene shows a depression in freezing point…
  28. Q28 2023
    The colligative property used for the determination of molar mass of polymers and proteins is…
  29. Q29 2023
    Low concentration of oxygen in the blood and tissues of people living at high altitude is due to…