Question

Statement-1 : Cuprous ion (Cu⁺) has unpaired electrons while
cupric ion (Cu⁺⁺) does not.
Statement-2 : Cuprous ion (Cu⁺) is colourless whereas cupric
ion (Cu⁺⁺) is blue in the aqueous solution

Answer 1

Answer:

Explanation:

Cupric ion produces blue colour in solution due to the presence of. ... Cuprous ion (Cu$$^+$$) is colourless whereas cupric ion (Cu$$^{2+}$$) produces blue colour in solution. Reason. Cuprous ion (Cu$$^+$$) has unpaired electrons while cupric ion ... Both Assertion and Reason are correct but Reason is not the correct ...

Answer 2

Statement-1 is wrong but statement 2 is correct.

Explanation:

• Copper is a d group element with atomic number 29.

• So it has an electronic configuration of [Ar] 3d10 4s1.

• In the cuprous form, it has configuration of [Ar] 3d10 4s0.

• In the cupric form, it has configuration of [Ar] 3d9 4s0.

• So cuprous has no unpaired electron.

• Thus it is colourless.

• But cupric ion has a free unpaired electron in its d shell.

• So colour is given by d d transition.

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