Multiple choice

Identify the incorrect statements. P. Pentaborane-11shows symmetrical square pyramidal geometry. Q. CsBr crystal has face centred cubic structure. R. MgAl2O4 and Fe3O4 are identical in crystal structure.

  1. P only

  2. Q only

  3. R only

  4. P, Q

  5. Q, R
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

P. Pentaborane-11 (B5H11) has an unsymmetrical square pyramidal geometry, in which five boron atoms occupy the five corners of a square pyramid. Q. The crystal of CsBr has body centred cubic structure. R. MgAl2O4 and Fe3O4 have spinel structures. Hence, statement P and Q both are incorrect.

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