This document contains questions about Group 13 elements that have been shared under a Creative Commons license to facilitate peer instruction. The questions cover topics such as which boron halide is most Lewis acidic, the source of acidity in boric acid, the most representative element of Group 13 chemistry, and the cause of the inert pair effect.

1. Group 13 Flip

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• These questions have been
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3. Which of these is the most Lewis acidic
boron halide?
A. BF3
B. BCl3
C. BBr3
D. BI3
BF3
BCl3
BBr3
BI3
0% 0%0%0%

4. Which colour indicates the source of the
Brønsted acidity of boric acid?
A. Blue
B. Red
C. Neither
D. Both
Blue
Red
Neither
Both
0% 0%0%0%

5. Which of these elements is most
representative of Group 13 Chemistry?
A. Scandium
B. Boron
C. Aluminium
D. Thallium
Scandium
Boron
Alum
inium
Thallium
0% 0%0%0%

6. What is responsible for the
inert pair effect?
A. Dative bonding
B. Increasing
ionisation
energies
C. Hund’s rule of
maximum
multiplicity
D. Poor orbital
overlap
Dative
bonding
Increasingionisation
ene...
Hund’srule
ofm
axim
um
...
Poororbitaloverlap
0% 0%0%0%