First slide

Atomic and physical properties

Question

Dihydrate of alumina is present in

Easy

A

Diaspore
B

Cryolite
C

Bauxite
D

Gypsum

Solution

$Diaspore:\,A{l_2}{O_3}.{H_2}O\$
$Bauxite:\,A{l_2}{O_3}.2{H_2}O\,\,[Dihydrate\,of\,alumina]$
$Gypsum:\,CaS{O_4}.2{H_2}O$
$Cryolite:\,N{a_3}Al{F_6}$

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