‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of class

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General Principles and processes of Isolation of Elements

hard

‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of the class

A

Sodium-alumino silicate

B

Zinc cobaltate

C

Basic copper carbonate

D

Prussian blue

(AIIMS-1980)

Solution

(a)Lapis lazuli is the aluminium silicate present in earth rocks as blue stone.

Standard 12

Chemistry

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