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Sodium silicate reacts with carbon dioxide to give what?

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in Casting-Forming-Welding I by (687k points)
Sodium silicate reacts with carbon dioxide to give what?

(a) Sodium dichromate

(b) Sodium sulphide

(c) Sodium bicarbonate

(d) Sodium carbonate

The question was asked in examination.

This is a very interesting question from Types of Cores topic in section Core and Core Making of Casting-Forming-Welding I

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Right choice is (d) Sodium carbonate

The explanation is: When sodium silicate is made to react with carbon dioxide gas, it is known to yield sodium carbonate and silica gel.

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