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Building Materials

Q1:

Upto a maximum of 72% of iron, is available in

A Magnetite

B Red haemetite

C Limonite

D Siderite

E Iron pyrites.

ANS:A - Magnetite

Haematite : 70-75% Iron.
Limonite : 60% iron.
Magnetite : 70-72% iron.
Siderite : 42-44%iron.
Iron pyrite: 45-47% iron.
Black band : 40-42% iron.



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