Choose the correct statements:a)In comparison to other cations, H+ has highest value of molar conductivity in aqueous solutionb)Among anions NH2– has highest value of molar conductivity in liquor ammoniac)Among cations, H+ has highest value of molar conductivity in all solutionsd)Among anions, HO+ has highest value of mo lar conductivity in all solutions.Correct answer is option 'A,B'. Can you explain this answer?

Question

Choose the correct statements:a)In comparison to other cations, H+ has highest value of molar conductivity in aqueous solutionb)Among anions NH2&#8211; has highest value of molar conductivity in liquor ammoniac)Among cations, H+ has highest value of molar conductivity in all solutionsd)Among anions, HO+ has highest value of mo lar conductivity in all solutions.Correct answer is option 'A,B'. Can you explain this answer?

Answer

Molar Conductivity of Cations and Anions

Molar conductivity is a measure of the ability of an ion to carry an electric current in a solution. It is defined as the conductivity of a solution containing one mole of the electrolyte in one liter of the solution. The molar conductivity of a cation or anion depends on its charge, size, and hydration energy.

Cations with highest molar conductivity

Among the cations, the H+ ion has the highest value of molar conductivity in aqueous solution. This is because the H+ ion is the smallest cation and has the highest charge density. It is also highly hydrated in aqueous solution, which reduces its effective size and increases its mobility.

Anions with highest molar conductivity

Among the anions, the NH2- ion has the highest value of molar conductivity in liquor ammonia. This is because the NH2- ion is highly polarizable and can form strong hydrogen bonds with ammonia molecules, which increases its mobility in the solution.

Conclusion

Therefore, the correct statements are A and B. The molar conductivity of a cation or anion depends on its charge, size, and hydration energy. H+ ion has the highest value of molar conductivity in aqueous solution, and NH2- ion has the highest value of molar conductivity in liquor ammonia.

Answer

It is basically because of very small size of H(+).It can move with maximum speed,350 with proper unit.
[It is proposed that there's a fast reorganization of H- bonded network throughout the aqueous medium so that the H(+), actually discharged at the cathode is the closest to it , the reorganization continues throughout till the remote H(+),
like the pickpocker steals the pouch which is very quickly passed to the last person in the railway coach through the well organised gangsters].
In liquor ammonia as a solvent, the dissociation is as
NH3 + NH3 --->NH4(+) + NH2(-).
NH2(-) will be having the quite small size,also considering its H- bonding similar to stated above it has maximum molar conductivity.

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