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Solutions Quiz-4

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10 Question

Popular Questions In Solutions Quiz-4

  • A solution containing 1.8g of a compound (empirical formula CH2OCH_2O) in 40g of water is observed to freeze at 0.465C-0.465^\circ C. The molecular formula of the compound is (Kf=1.86 kg K mol1K_f = 1.86\text{ kg K mol}^{-1})

  • KfK_f for water is 1.86 K kg mol11.86\text{ K kg mol}^{-1}. If your automobile radiator holds 1.0 kg of water, how many grams of ethylene glycol (C2H6O2C_2H_6O_2) must you add to get the freezing point of the solution lowered by 2.8C2.8^\circ C?

  • Calculate the molal depression constant of a solvent which has freezing point 16.6C16.6^\circ C and latent heat of fusion 180.75Jg1.180.75\, J\, g^{-1}..

  • The freezing point of water is depressed by 0.37C0.37^\circ C in a 0.01 molal NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by.

  • The freezing point depression constant of water is 1.86Cm1.86^\circ C\,m . If 5.00 g of Na2SO4Na_2SO_4 is dissolved in 45.0g of H2OH_2O, the freezing point is found to be 3.82C-3.82^\circ C. Calculate the can’t Hoff factor for Na2SO4Na_2SO_4.

  • 0.01 M solution of KCl and BaCl2BaCl_2 are prepared in water. The freezing point of KCl solution is fount to be2C -2^\circ C. What is the freezing point of BaCl2BaCl_2 solution, assuming complete Ionization?

  • Van't Hoff factors of aqueous solution of X, Y and Z are 1.8, 0.8 and 2.5 respectively. Hence, correct order of the colligative property will be?

  • If osmotic pressure of 1 M urea is π\pi, what will be the osmotic pressure for 0.1 M NaCl?

  • An aqueous solution containing 1.248g of barium chloride (molar mass = 208.34g mol1mol^{-1}) in 100g of water boils at 100.0832C100.0832^{\circ} C. Calculate the degree of dissociation of BaCl2BaCl_2 (KfK_f for water=0.52 K kg mol1= 0.52\text{ K kg mol}^{-1} )

  • The Henry’s law constant for the solubility of N2N_2 gas in water at 298 K is 1.0×1051.0 \times 10^{5} atm. The mole fraction of N2N_2 in air is 0.8. The number of moles of N2N_2 from air dissolved in 10 moles of water at 298 K and 5 atm pressure is.