Assertion (A) Many trivalent lanthanoid ions are coloured both in solid state and in aqueous solution. Reason (R) Colour of these ions is due to the presence of f-electrons.

Question

Assertion (A) Many trivalent lanthanoid ions are coloured both in solid state and in aqueous solution. Reason (R) Colour of these ions is due to the presence of f-electrons. (A) Both A and R are correct; R is the correct explanation of A. (B) Both A and R are correct; R is not the correct explanation of A. (C) A is correct; R is incorrect. (D) R is correct; A is incorrect.

Tardigrade Admin · Accepted Answer

Many trivalent lanthanoid ions are coloured due to the presence of unpaired f-electrons, in solid state as well as in aqueous solutions.

Q. Assertion (A) Many trivalent lanthanoid ions are coloured both in solid state and in aqueous solution.
Reason (R) Colour of these ions is due to the presence of $f$ -electrons.

Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$ .

Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$ .

$A$ is correct; $R$ is incorrect.

$R$ is correct; $A$ is incorrect.

Many trivalent lanthanoid ions are coloured due to the presence of unpaired $f$ -electrons, in solid state as well as in aqueous solutions.

Q. Assertion (A) Many trivalent lanthanoid ions are coloured both in solid state and in aqueous solution. Reason (R) Colour of these ions is due to the presence of f-electrons.

Both A and R are correct; R is the correct explanation of A.

Both A and R are correct; R is not the correct explanation of A.

A is correct; R is incorrect.

R is correct; A is incorrect.