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A rock contains 1.02% Al(2)O(3) and 1.80...

A rock contains `1.02% Al_(2)O_(3)` and `1.80% SiO_(2)` by mass). Apart from free `SiO_(2)`, some `SiO_(2)` in the rock is present as kaolin `(Al_(2)O_(3). 2SiO_(2))`. All`Al_(2)O_(3)` in the rock is present as kaolin. The mass percentage of free `SiO_(2)` in the rock is : (Al = 27, Si=28)

A

`1.2%`

B

`0.6%`

C

`1.8%`

D

`0.8%`

Text Solution

Verified by Experts

The correct Answer is:
B
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