Question

Wch of the following mineral does not contain aluminium? A.cryolite B.mica C.corundum D.dolomite

Answer 1

Hi.

Here is your answer-------

The correct answer is option D. Dolomite, as it does not contains Aluminum.

A - Cryolite {Na3AlF6} -It contains Aluminum.

B - Mica- It also Contains the Aluminium.There is no exact formula for mica. By the way General formula of the  mica group is
XY2–3Z4O10 (OH, F)2
Where as---
X = K, Na, Ba, Ca, Cs, (H3O), (NH4);
Y = Al, Mg, Fe2+, Li, Cr, Mn, V, Zn; and
 Z = Si, Al, Fe3+, Be, Ti.  

C - Corundum {Al2O3} -It contains Aluminum.

D - Dolomite {CaMg(CO3)2} - it does not contains Aluminum.

Thus, Correct answer is option D.{Dolomite}.

Hope it helps.

Have a nice day.

Answer 2

Answer: The answer is cryolite

Explanation: