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Why is magnesium oxide used as a refract...

Why is magnesium oxide used as a refractory material?

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Magnesium oxide is used as a refractory material, because of its very high temperature of fusion. It is very stable to heat and fuses at 2770K.
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ICSE-SAMPLE QUESTION PAPER-Question
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  3. Why is magnesium oxide used as a refractory material?

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  6. Identify the functional groups in the following compounds

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  7. Identify the functional groups is the following compounds:

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  9. 0.22 g of an organic compound on combustion in an atmosphere of CO2 ga...

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  10. Complete and balance the following equation : Fe + H2 O

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  11. Complete the following chemical reactions. PbS(s)+H(2)O(2)(aq)to ...

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  20. Write the resonance structures of CO(3)^(2-)" and "HCO(3)^(-).

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