Corundum is :...

Corundum is :

A

`SiO_3`

B

`CaF_2`

C

`Al_2O_3`

D

`Cr_2O_3`

Text Solution

Verified by Experts

The correct Answer is:

C

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Al-Bronze contains Al and :
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Which is used as mordant ?
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Corundum is :
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Aqueous solution of potash alum is :
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The most electropositive element is :
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Alumina is the nature of :
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All allums contain
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The weakest Lewis acid is :
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Metal protected by a layer of its own oxide is :
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When orthoboric acid (H3BO3) is heated the residue left is :
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Molecular weight of anhydrous aluminium chloride is :
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on heating Al at 800^(@)C in air, Al2 O3 is formed. The reaction is :
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Borax is :
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Sapphire is a mineral of :
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Borax on heating with cobalt oxide forms a blue bead of :
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Alumina on heating with carbon in nitrogen atmosphere gives :
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Hoope's process is used in the refining of :
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The correct order of decreasing hardness of the following compound is ...
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When Al is added to potassium hydroxide solution :
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Purification of alumina is essential because :
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