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MCQ-16
Which order of IE is incorrect
A. Ba < Sr < Ca
B. Al < Si < P
C. B < Be < C
D. O > N > Si

Answer: D

MCQ-17
The energy gap between 2nd ionization energy and 3rd ionization energy is very large, it is true for an element having ______ Z value belonging to ______
A. 11, I-A
B. 12, II-A
C. 13, III-A
D. 14, IV-A

Answer: B

MCQ-18
Select the specie that has a different shape than others
A. H₃O⁺
B. NH₃
C. BF₃
D. NF₃

Answer: C

MCQ-19
The central atom of which of the following class of molecules carries bond pair-bond pair repulsions only
A. AB₂
B. AB₃
C. AB₄
D. AB₅

Answer: A

MCQ-20
The shape of the carbonate ion is
A. Square planar
B. Angular
C. Trigonal planar
D. Tetrahedral

Answer: C