BUFFERS AND BUFFERING AGENT
TOP 10 MCQ
1. The required amount of adjusting substance required to make a hypotonic solution isotonic is given by the C (Where, W = Adjusting substance, a = Freezing point depression of unadjusted solution and b = Freezing point depression of water) [GPAT-2023 SHIFT-II]
(a) w = (a − 0.52) / b
(b) w = (0.52 − a) / b
(c) w = (0.52 − b) / a
(d) w = (b − 0.52) / a
2. A 2.0% saline solution is [GPAT-2023 SHIFT-II]
(a) Hypotonic
(b) Hypertonic
(c) Isotonic
(d) Iso-osmotic
3. When the concentration of an aqueous sodium chloride solution has the same colligative properties as the solution in question, the value so obtained is known as [GPAT-2020]
(a) Normality
(b) Isotonicity value
(c) Molarity
(d) Molality
4. The ‘Crenulation’ effect on the cell wall is caused by ______ solutions and this effect is ______ [GPAT-2020]
(a) Hypertonic, reversible
(b) Hypotonic, reversible
(c) Hypotonic, irreversible
(d) Hypertonic, irreversible
5. Buffer capacity is also referred to as [GPAT-2018]
(a) Buffer index
(b) Buffer value
(c) Buffer efficiency
(d) All of these
6. Which among the following is a Class-I method used for rendering a solution of drug isotonic with body fluids [GPAT-2017]
(a) Cryoscopic method
(b) White-Vincent method
(c) Sprowls method
(d) Hammarlund method
7. Which among the following is the Henderson Hasselbalch equation for a weak base and its salt [GPAT-2013]
(a) pH = pK_b + Log([salt]/[base])
(b) pH = pK_b + Log([base]/[salt])
(c) pH = pK_a + Log([salt]/[base])
(d) pH = pK_a + Log([base]/[salt])
8. The chelate, EDTA can be described as what type of chelating ligand [GPAT-2013]
(a) Bidentate
(b) Tetradentate
(c) Hexadentat
(d) Tridentate
9. Sorensen apparatus is used for determination of [GPAT-2013]
(a) Crystal growth
(b) pH scale
(c) HLB value
(d) Interparticle force
10. Upon standing sometimes gel system shrinks a bit and little liquid is pressed out. What is this phenomenon known as [GPAT-2011]
(a) Oozing
(b) Syneresis
(c) Shrinking
(d) Desolvation
ANSWER KEY
| 1-b | 2-b | 3-b | 4-a | 5-d | 6-a | 7-b | 8-c | 9-b | 10-b |
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