1.

Which of the following compound forms the bond between sand particles in carbon dioxide moulding process.(a) Sodium(b) Amorphous silica(c) Dehydrated water(d) Carbon Monoxide

Answer» Correct choice is (b) Amorphous silica

Explanation: Amorphous silica forms the bond between sand particles. It is produced by reaction or treatment of the mixture of sand and sodium silicates by carbon dioxide.


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