MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic Chemistryp-Block (group 13 and 14)Aluminium and Its Compounds
Select the true statements: (i) The formula of the corundum is Al₂O₃. (ii) The formula of cryolite is Na₃AlF₆. (iii) The formula of borax is Na₂B₄O₇.10H₂O (iv) The formula of bauxite is Al₂O₃.H₂O
A.(i), (ii) and (iii)✓ Correct
B.(ii), (iii) and (iv)
C.(i), (ii) and (iv)
D.(iii) and (iv)
Explanation
Corundum, Cryolite and Bauxite are the ores of aluminium with chemical formula given below: p-BLOCK (GROUP 13 AND 14) 14 2 3 3 6 2 3 2 Corrundum Al O Cryolite Na AlF Bauxite Al O .2H O - - - Where, Borax is the natural mineral salt of boric acid. Its chemical formula is- 2 4 7 2 Borax Na B O .10H O - Therefore in the given question, Bauxite has 1water of crystallization molecule. But in actual it has 2 water of crystallization molecules.
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