Osmotic pressure does not depend on (1) Temperature (3) Molecular weight (2) Degree of ionization (4) Molar concentration Osmotic Pressure: Osmotic pressure is the pressure required to stop the flow of solvent through a semi-permeable membrane separating two solutions of different concentrations. It depends on the concentration of solute particles in the solution. Formula for … Read more
Which of the following will have maximum effect on lowering in vapour pressure if added in equimolar concentration?(1) Sucrose(3) NaCl(2) Glucose(4) CaCl₂ What is Vapor Pressure Lowering? When you add a solute (like sugar or salt) to a solvent (like water), it lowers the vapor pressure of the solvent. This is called lowering of vapor … Read more
If you mix equal volumes of pH 4.0 and pH 6.0 solutions, what will be the approximate pH of the final solution? (1)7.0 (3)5.0 (2) 3.7 (4) 4.3
Tris hydroxyethyl aminoethane (THAE) has a pk, of 8.4. The buffering capacity of a buffer made with this compound will be greatest at which pH? (1) pH 9.4 ffer (2) pH 7.4 (3) pH 8.4 (4) Both at pH 7.4 and 9.4 Concept: Buffering Capacity and pKa The buffering capacity of a buffer is highest … Read more
What is the concentration of OH in a solution with a H’ concentration of 1.3 * 10 ^ – 4 M? (1) 7.7 * 10 ^ – 10 * M (2) 7.7 * 10 ^ – 9 * M (3) 7.7 * 10 ^ – 11 * M (4) 7.7 * 10 ^ – 12 … Read more
If pH of solution of NaOH is 12.0 the pH of H2 SO4 solution of same molarity will be (1) 2.0 (3) 1.7 (2) 12.0 (4) 10.0387
A 10 N HCI solution was diluted 10-fold with water and the pH of the diluted solution was measured with a pH meter after calibration using standard solutions. Given that the activity coefficient for diluted HCI was 0.01, the pH of the solution would be (1) 0 (3) 2 (2) 1 (4) 2.5
The pka of acetic acid is 4.76. At what pH would the concentration of acetic acid and acetate ion be the same? (1) pH = 7 (3) pH = 9.8 (2) pH = 6.7 (4) pH = 4.76
Which one of the following amino-containing buffering molecules will be the most able to resist change in pH when in a pH 7.0 solution at a total (ionized and non-ionic) concentration of 100mM? (1) Tris (pKa = 8.1) (3) MOPS {pKa = 7.3} (2) HEPES (pKa = 7.7) (4) PIPES (pKa = 7.1) Concept: Best … Read more
The pH of the blood can be maintained by (1) Myoglobin (2) globulins (3) albumins (4) carbonate/bicarbonate salt