Published by:
CGP EDU Academic Team
Published on: August 13, 2026
SECTION 2 (Maximum Marks: 40)
This section contains TEN questions
Each question has FOUR options
A
, 
B
, 
C
and 
D
. ONE OR MORE THAN ONE of these four option(s) is(are) correct. Marking scheme: +4 If only the bubble(s) corresponding to all the correct option(s) is (are) darkened 0 If none of the bubbles is darkened -2 In all other cases If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are 
Text Solution
Verified by ExpertsThe correct answer is:
A
In ccp lattice:
Number of O atoms 
4
Number of Octahedral voids 
4
Number of tatrahedral voids 
8
Number of Al 3+ = 4xm
Number of Mg 2+ = 8xn
Due to charge neutrality
4(-2)+4m(+3)+8n(+2)= 0
and 
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