Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Solutions question

2022 · 28 Jul · Shift 1 · Q16
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Solutions
  5. /2022 · 28 Jul · Shift 1 · Q16

Solutions question

2022 · 28 Jul · Shift 1 · Q16

JEE MainChemistrySolutionsNumerical+4 / −1
150 g150 \mathrm{~g}150 g of acetic acid was contaminated with 10.2 g10.2 \mathrm{~g}10.2 g ascorbic acid (C6H8O6)\left(\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}\right)(C6​H8​O6​) to lower down its freezing point by (x×10−1)∘C\left(x \times 10^{-1}\right)^{\circ} \mathrm{C}(x×10−1)∘C. The value of xxx is ‾\underline{\hspace{2cm}}​. (Nearest integer) [Given Kf=3.9 K kg mol−1\mathrm{K}_{f}=3.9 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}Kf​=3.9 K kg mol−1; molar mass of ascorbic acid =176 g mol−1=176 \mathrm{~g} \mathrm{~mol}^{-1}=176 g mol−1]
Numerical answer
PreviousNext

More from Solutions

  • A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour…2022 · Numerical
  • The vapour pressures of two volatile liquids A and B at 25 ∘ C are 50 Torr and 100 Torr, respectively. If the liquid mixture contains 0.3 mole fraction of A, then the mole fraction of liquid B in the vapour phase is ${x \over…2022 · Numerical
  • 2.5 g of protein containing only glycine (C2​H5​NO2​) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5.03 × 10 − 3 bar. The total number of glycine units present…2022 · Numerical
  • If O2​ gas is bubbled through water at 303 K, the number of millimoles of O2​ gas that dissolve in 1 litre of water is ​. (Nearest Integer) (Given : Henry's Law constant for O2​…2022 · Numerical
  • 1.80 g of solute A was dissolved in 62.5 cm3 of ethanol and freezing point of the solution was found to be 155.1 K. The molar mass of solute A is ​ g mol−1.…2022 · Numerical
  • 1.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid is 0.0198 ∘ C. The percentage of dissociation of the acid is ​.…2022 · Numerical
  • Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K. The depression in freezing point for 4.5 molal solution of glucose in water is 4 K. The ratio of molal elevation constant to molal depression constant (Kb/Kf) is…2022 · Numerical
  • For a solution of the gases A, B, C and D in water at 298 K, the values of Henry's law constant (KH) are 30.40, 2.34, 1.56 × 10 − 5 and 0.513 k bar respectively. In the given graph, the lines marked as 'p' and 's' correspond… Includes diagram2022 · MCQ