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Magnetic Properties

Most copper ...

Question

Most copper $(I)$ compounds are found to be colourless. This is due to :

presence of low oxidation state of copper

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completely filled d-level in

C u (I)

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diamagnetic nature of the compound

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high polarizability of

C u (I)

ion

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Solution

The correct option is A completely filled d-level in $C u (I)$
In copper (I) ion there are no vacant d orbitals as it is diamagnetic. Copper(I) ion being less charged has small ligand field effect and the transition is in the infrared region in which no color is perceived by human eye.

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(i)	(ii)	(iii)	(iv)	(v)	(vi)
A

I . A g I

II . N a I

III . C u I

IV . N a C l

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