NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- s Block Elements
NTA Abhyas 2020 · Chemistry · s Block Elements
The solubility of alkali metal salts in water is due to the fact...
The solubility of alkali metal salts in water is due to the fact that the cations get hydrated by water molecules.
What is the relative degree of hydration?
What is the relative degree of hydration?
Options
- A^{+} > R{b}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > N{a}_{\left(aq\right)}^{+} > L{i}_{\left(aq\right)}^{+}
- B^{+} > N{a}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+} > C{s}_{\left(aq\right)}^{+}
- C^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+} > C{s}_{\left(aq\right)}^{+} > L{i}_{\left(aq\right)}^{+}
- D^{+} > N{a}_{\left(aq\right)}^{+} > L{i}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+}
Correct answer
B. ^{+} > N{a}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+} > C{s}_{\left(aq\right)}^{+}
Step-by-step solution
As hydration energy charge on cation
As on moving down size of ion increases so degree of hydration decreases hence the correct order is
^{+} > N{a}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+} > C{s}_{\left(aq\right)}^{+}
As on moving down size of ion increases so degree of hydration decreases hence the correct order is
^{+} > N{a}_{\left(aq\right)}^{+} > {K}_{\left(aq\right)}^{+} > R{b}_{\left(aq\right)}^{+} > C{s}_{\left(aq\right)}^{+}