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State two relevant observation Ammoniu...

State two relevant observation
Ammonium hydroxide solution is added to copper (II) nitrate solution in small quantities and then in excess.

A

Tetraamine Copper Sulphate is formed at the product side.

B

Reddish Brown Colour precipitate of Zinc hydroxide and NaCl is formed at the product side

C

Zinc Oxide is formed at the product side.

D

Light Brown crystals of Copper hydroxide is formed at the end of product side

Text Solution

Verified by Experts

The correct Answer is:
A
Initially a light blue ppt is formed which on addition of excess of ammonium hydroxide dissolves and a deep inky blue solution is formed.
`CuSO_(4) + 2NH_(4)OH rarr Cu(OH)_(2) darr + (NH_(4))_(2)SO_(4)` Blue with Pale blue ppt. Colourless in solution excess of `NH_(4)OH`, ppt. dissolves
`Cu(OH)_(2) + (NH_(4))SO_(4) + 2NH_(4)OH rarr underset("Tetrammine copper (II) sulphate (excess)")([Cu(NH_(3))_(4)]SO_(4) + 4H_(2)O`
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