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Purple of Cassius is...

Purple of Cassius is

A

Gold sol

B

Silver sol

C

Copper sol

D

Platinum sol

Text Solution

Verified by Experts

The correct Answer is:
A
We know that by reducing auric chloride by stannous chloride, the colloidal solution of gold is obtained. It is known as purple of cassius.
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Match list I (Colloidal system ) with list II (Example) {:("Column-I","Column-II"),((A)"Emulsifier",(p)"Colloidal solution"),((B)"Xerogel",(q)"Soaps "),((C )"Colloidal electrolyte",(r)"Foil of cellophane"),((D)"Purple of Cassius",(s)"Dextrin"),(,(t)"Gold sol"):}

What is purple of casis ?

The sulphide ion gives purple colour which sodium nitroprusside. The purple colour is due to the formation of: