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Choose the correct statement(s) about co...

Choose the correct statement(s) about colour of lathanoids:

A

Colour of the ions may be attribued to the presence of f-electrons.

B

`Lu^(3+), Yb^(2+), La^(3+), Ce^(3+)` are colourless.

C

Absorption bands are narrow, probably because of excitation within f-level.

D

Elements with (n) f electrons have a similar colour to those with (14-n)f electrons.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
`Lu^(3+), YB^(2+) rarr 4f^(14)`
`La^(3+), Ce^(4+) rarr 4f^(0)`
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