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Fire-resistant mortar is obtained by the addition of ____________ to the powder of fire-bricks.

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Fire-resistant mortar is obtained by the addition of ____________ to the powder of fire-bricks.

(a) Silica

(b) Sodium silicate

(c) Aluminous cement

(d) Caustic soda

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The correct option is (c) Aluminous cement

Best explanation: Fire-resistant mortar is obtained by the addition of aluminous cement to the powder of fire-bricks. Because this mortar is fire resistant, it is used with fire bricks for lining furnaces, ovens, etc.
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