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)
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. |
Match the laws given in Column I with expressions given in Column II.
Column I | Column II |
A. Raoult’s law | 1. = CRT |
B. Osmotic pressure | 2. |
C. Elevation of boiling point | 3. |
D. Depression in freezing point | 4. |
Codes
A | B | C | D | |
1. | 2 | 3 | 4 | 1 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 3 | 1 | 4 | 2 |
Select the correct option based on statements below:
Assertion (A): | When methyl alcohol is added to water, boiling point of water increases. |
Reason (R): | When a volatile solute is added to a volatile solvent, elevation in boiling point is observed. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |