Q. No.An unripe mango placed in a concentrated salt solution to prepare pickle shrivels because -
1. It gains water due to osmosis.
2. It loses water due to reverse osmosis.
3. It gains water due to reverse osmosis.
4. It loses water due to osmosis.
At a given temperature, osmotic pressure of a concentrated solution of a substance:
| 1. | is higher than that of a dilute solution. |
| 2. | is lower than that of a dilute solution. |
| 3. | is same as that of a dilute solution. |
| 4. | cannot be compared with osmotic pressure of dilute solution. |
The incorrect statement among the following is:
| 1. | Two different solutions of sucrose of the same molality prepared in different solvents will have the same depression in freezing point. |
| 2. | The osmotic pressure of a solution is given by the equation π = CRT (where C is the molarity of the solution) |
| 3. | Decreasing order of osmotic pressure for 0.01 M aqueous solutions of BaCl2 > KCl > CH3COOH > sucrose |
| 4. | The vapour pressure exerted by a volatile component of a solution is directly proportional to its mole fraction in the solution. |
The values of van’t Hoff factors for KCl, NaCl and K2SO4 respectively are .......... .
1. 2, 2 and 2
2. 2, 2 and 3
3. 1, 1 and 2
4. 1, 1 and 1
The incorrect statement among the following is:
| 1. | Units of atmospheric pressure and osmotic pressure are the same. |
| 2. | In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration. |
| 3. | The value of molal depression constant depends on nature of solvent. |
| 4. | Relative lowering of vapour pressure, is a dimensionless quantity. |
The value of Henry's constant KH -
1. Increases with increase in temperature.
2. Decreases with increase in temperature.
3. Remains constant.
4. First increases then decreases.
The value of Henry's constant, KH is ......... .
1. Greater for gases with higher solubility.
2. Greater for gases with lower solubility.
3. Constant for all gases.
4. Not related to the solubility of gases.
Consider the figure and mark the correct option.
| 1. | Water will move from the side (B) to side (A) if pressure is lower than the osmotic pressure is applied on piston (B). |
| 2. | Water will move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B). |
| 3. | Water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B). |
| 4. | Water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A). |
Three aqueous solutions of NaCl are labelled as ‘A', ‘B’ and ‘C with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of van’t Hoff factor for these solutions will be in the order of -
1. iA < iB < iC
2. iA > iB > iC
3. iA = iB = iC
4. iA < iB > iC
On the basis of the information given below mark the correct option.
Information
| i. | In bromoethane and chloroethane mixture intermolecular interactions of A—A and B—B type are nearly the same as A—B type interactions. |
| ii. | In ethanol and acetone mixture A—A or B—B type intermolecular interactions are stronger than A—B type interactions. |
| iii. | In chloroform and acetone mixture A—A or B—B type intermolecular interactions are weaker than A—B type interactions. |
1. Solution (ii) and (iii) will follow Raoult’s law
2. Solution (i) will follow Raoult’s law
3. Solution (ii) will show negative deviation from Raoult’s law
4. Solution (iii) will show positive deviation from Raoult’s law
© 2024 GoodEd Technologies Pvt. Ltd.