

MCQOPTIONS
This section includes 43 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
1. |
Benzene and toluene form nearly ideal solutions. At 20°C, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20°C for a solution containing 78 g of benzene and 46 g of toluene in torr is [AIEEE 2005] |
A. | 25 |
B. | 50 |
C. | 53.5 |
D. | 37.5 |
Answer» C. 53.5 | |
2. |
0.5 molal aqueous solution of a weak acid (HX) is 20% ionized. If Kf for water is 1.86 K kg mol-1, the lowering in freezing point of the solution is [CBSE AIPMT 2007] |
A. | –0.56 K |
B. | –1.12 K |
C. | 0.56 K |
D. | 1.12 K |
Answer» E. | |
3. |
The molarity of a NaOH solution by dissolving 4 g of it in 250 ml water is [West Bengal JEE 2010] |
A. | 0.4 M |
B. | 0.8 M |
C. | 0.2 M |
D. | 0.1 M |
Answer» B. 0.8 M | |
4. |
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water |
A. | 0.0744 K |
B. | 0.0186 K |
C. | 0.0372 K |
D. | 0.0558 K |
Answer» E. | |
5. |
On mixing, heptanes and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components (heptanes and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0 g of heptanes and 35 g of octane will be (molar mass of heptanes = 100 g mol-1 and of octane = 114 g mol-1) [AIEEE 2010] |
A. | 96.2 kPa |
B. | 144.5 kPa |
C. | 72.0 kPa |
D. | 36.1 kPa |
Answer» D. 36.1 kPa | |
6. |
25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociates completely, molar concentration of sodium Ion, Na+ and carbonate ions, CO32- are respectively (Molar mass of NasCO3 = 106 g mol-1) [CBSE AIPMT 2010] |
A. | 1.90 M and 1.910 M |
B. | 0.477 M and 0.0477 M |
C. | 0.955 M and 1.910 M |
D. | 1.910 M and 0.955 M |
Answer» E. | |
7. |
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase? [CBSE AIPMT 2010] |
A. | addition of 1.00 molal KI |
B. | addition of water |
C. | addition of NaCl |
D. | addition of Na2SO4 |
Answer» C. addition of NaCl | |
8. |
A solution of sucrose (molar mass = 342 g mol-1) has been prepared by dissolving 68.5 g of sucrose in 100 g of water. The freezing point of the solution obtained will be (Kf for water = 1.86 K kg mol-1) [CBSE AIPMT 2010] |
A. | + 0.372°C |
B. | – 0.570°C |
C. | – 0.372°C |
D. | – 0.520°C |
Answer» D. – 0.520°C | |
9. |
A 5% solution of cane sugar (molar mass 342 is isotonic with 1% of a solution of an unknown solute. The molar mass of unknown solute in g/mol is [AIEEE 2011] |
A. | 34.2 |
B. | 136.2 |
C. | 171.2 |
D. | 68.4 |
Answer» E. | |
10. |
Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at –6°C will be: (Kffor water = 1.86 K kg mol–1 and molar mass of ethylene glycol = 62 g mol–1) [AIEEE 2011] |
A. | 304.60 g |
B. | 804.32 g |
C. | 204.30 g |
D. | 400.00 g |
Answer» C. 204.30 g | |
11. |
58.5 gm of NaCl and 180 gm of glucose were separately dissolved in 1000 ml of water. Identify the correct statement regarding the elevation of boiling point (b.p.) of the resulting solutions. [West Bengal JEE] |
A. | NaCl solution will show higher elevation of b.p. |
B. | Glucose solution will show higher elevation of b.p. |
C. | Both the solutions will show equal elevation of b.p. |
D. | The b.p. elevation will be shown by neither of the solutions |
Answer» B. Glucose solution will show higher elevation of b.p. | |
12. |
Frances Descroizilles in 18th century developed |
A. | burette |
B. | pipette |
C. | beaker |
D. | measuring cylinder |
Answer» C. beaker | |
13. |
One of most common kind of titration involves exact neutralization of an alkali (-OH-) by a/an |
A. | base |
B. | acid |
C. | salt |
D. | suspension |
Answer» C. salt | |
14. |
Solution is highly concentrated when solute is in |
A. | high concentration |
B. | low concentration |
C. | high temperature |
D. | low temperature |
Answer» B. low concentration | |
15. |
When there is a low concentration of solute in a solution, it is known as |
A. | diluted solution |
B. | saturated solution |
C. | concentrated solution |
D. | unsaturated solution |
Answer» B. saturated solution | |
16. |
Only liquid metal at room temperature is |
A. | sodium |
B. | iron |
C. | mercury |
D. | aluminum |
Answer» D. aluminum | |
17. |
In air nitrogen gas acts as |
A. | solute |
B. | solvent |
C. | gaseous solute |
D. | aqueous solute |
Answer» C. gaseous solute | |
18. |
Methanol and water are |
A. | miscible |
B. | non miscible |
C. | forms saturated solution |
D. | forms supersaturated solution |
Answer» B. non miscible | |
19. |
Mass of solute dissolved in 100g of solution refers to |
A. | percentage of solution |
B. | molarity of solution |
C. | molality of solution |
D. | none of above |
Answer» B. molarity of solution | |
20. |
In presence of crystals of solute a supersaturated solution is |
A. | not stable |
B. | stable |
C. | cannot be made |
D. | none of above |
Answer» B. stable | |
21. |
Solutions that contain solid solutes in liquid solvents are called |
A. | liquids in solids |
B. | solids in liquids |
C. | solids in solids |
D. | solids in gas |
Answer» C. solids in solids | |
22. |
When NaCl is dissolved in water, negative end of water molecules is attracted towards |
A. | Cl |
B. | H |
C. | He |
D. | Na |
Answer» E. | |
23. |
Colloids can |
A. | scatter light |
B. | not scatter light |
C. | absorb heat |
D. | evolve heat |
Answer» B. not scatter light | |
24. |
Concentration of solution is the |
A. | quantity of solvent in solute |
B. | quantity of solute in given solvent |
C. | unit to measure concentration |
D. | quantity of gas dissolved in liquid |
Answer» C. unit to measure concentration | |
25. |
An unsaturated solution |
A. | cannot dissolve more solute |
B. | cannot add more solvent |
C. | can add more solute |
D. | cannot be made |
Answer» D. cannot be made | |
26. |
Molarity of solution which contains 40 g urea dissolved in 500cm3 is |
A. | 1.2 M |
B. | 1.389 M |
C. | 1.334 M |
D. | 1.5 M |
Answer» D. 1.5 M | |
27. |
When tiny particles of a substance are dispersed through medium then mixture is called |
A. | alloys |
B. | amalgams |
C. | suspension |
D. | colloid |
Answer» E. | |
28. |
Substance present in lesser amount in solution is |
A. | solute |
B. | solvent |
C. | aqueous solvent |
D. | none of above |
Answer» B. solvent | |
29. |
In amalgams solvent is |
A. | gas |
B. | liquid |
C. | solid |
D. | none of above |
Answer» D. none of above | |
30. |
Concentration of a dilute solution |
A. | is high |
B. | is in comparable |
C. | can be both A and B |
D. | is low |
Answer» E. | |
31. |
In solutions particles are |
A. | invisible |
B. | visible by naked eye |
C. | visible by ordinary microscope |
D. | visible by electron microscope |
Answer» B. visible by naked eye | |
32. |
Mass of NaOH present per dm3 of 0.25M NaOH solution is |
A. | 10 g |
B. | 8 g |
C. | 5 g |
D. | 2 g |
Answer» B. 8 g | |
33. |
Solid solutions of metals are called |
A. | alloys |
B. | amalgams |
C. | saturated solutions |
D. | supersaturated solution |
Answer» B. amalgams | |
34. |
Commercially concentrated HCl is |
A. | 0.4 |
B. | 0.5 |
C. | 0.37 |
D. | 0.8 |
Answer» D. 0.8 | |
35. |
At a particular temperature solution which cannot dissolve more solute is called |
A. | saturated solution |
B. | unsaturated solution |
C. | aqueous solution |
D. | supersaturated solution |
Answer» B. unsaturated solution | |
36. |
Solubility is amount of solute dissolved in |
A. | 50 g of solvent |
B. | 100 g of solvent |
C. | 250 g of solvent |
D. | 200 g of solvent |
Answer» C. 250 g of solvent | |
37. |
Solution of mercury with other metals is called |
A. | amalgam |
B. | saturated solution |
C. | supersaturated solution |
D. | unsaturated solution |
Answer» B. saturated solution | |
38. |
A mixture that has uniform composition throughout is called |
A. | saturated solution |
B. | super saturated solution |
C. | solution |
D. | solvent |
Answer» D. solvent | |
39. |
Number of moles of solute dissolved per dm3 of solution is |
A. | molality |
B. | percentage |
C. | concentration |
D. | molarity |
Answer» E. | |
40. |
Solution of copper and zinc forms |
A. | sodium |
B. | mercury |
C. | brass |
D. | silver |
Answer» D. silver | |
41. |
To prepare ammonia gas, gaseous mixture of |
A. | hydrogen and chlorine is used |
B. | hydrogen and nitrogen is used |
C. | hydrogen and helium is used |
D. | hydrogen and iodine is used |
Answer» C. hydrogen and helium is used | |
42. |
Fog is a solution of |
A. | air in water vapors |
B. | air in air |
C. | vapors in vapors |
D. | water vapors in air |
Answer» E. | |
43. |
By passing hydrogen gas through vegetable oil, it is converted in to |
A. | butter |
B. | milk |
C. | ghee |
D. | none of above |
Answer» D. none of above | |