Building Materials
Cast iron

May contain 2 to 5 per cent of carbon with other impurities
Is manufactured in required shapes
Is obtained by purifying pig iron
All listed here

ANSWER DOWNLOAD EXAMIANS APP

Building Materials
Asbestos

Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
All of these
Contains iron oxide and alumina
Is a natural fibrous mineral substance

ANSWER DOWNLOAD EXAMIANS APP