Match the items given in Column I with the type of solutions given in Column II.
Column I | Column II |
A. Soda water | 1. A solution of gas in solid |
B. Sugar solution | 2. A solution of gas in liquid |
C. German silver | 3. A solution of solid in liquid |
D. Hydrogen gas in palladium | 4. A solution of solid in solid |
Codes
A | B | C | D | |
1. | 2 | 1 | 4 | 3 |
2. | 1 | 2 | 3 | 4 |
3. | 2 | 3 | 4 | 1 |
4. | 4 | 1 | 3 | 2 |
A solution that has the highest boiling point among the following is -
1. 1.0 M NaOH
2. 1.0 M Na2SO4
3. 1.0 M NH4NO3
4. 1.0 M KNO3
The unit of Ebullioscopic constant is:
1. K kg mol-1 or K (molality)-1
2. mol kg K-1 or K-1 (molality)
3. kg mol-1 K-1 or K-1 (molality)-1
4. K mol kg-1 or K (molality)
In comparison to a 0.01 M solution of glucose, the depression in the freezing point of a 0.01 M MgCl2 solution will be -
1. | Same | 2. | About twice |
3. | About three times | 4. | About six times |
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 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 an increase in temperature.
2. Decreases with an increase in temperature.
3. Remains constant.
4. First increases then decreases.
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