2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.3
Group III-A and IV-A Elements
Total MCQs = 38

31. Tincal is a mineral of: (FSD 2015) (GRW 2016, 2017) (LHR 2016, 2018) (DGK 2018) (RWP 2018, 2019) (AJK 2019) (SGD 2019 GII)

A. Al
B. B
C. Si
D. C

32. The chief ore of aluminium is: (GRW 2015) (SGD 2015, 2016) (MTN 2018 GII) (LHR 2019 GII) (BWP 2015, 2019 GII) (SWL 2019)

A. Na₃AlF₆
B. Al₂O₃.2H₂O
C. Al₂O₃
D. Al₂O₃.H₂O

33. The oxidation states of Boron are: ECAT 2016

A. +1, +2, +3
B. -1, -2, -3
C. +1, -1
D. +3, +1

34. Balance the following reaction: ECAT 2014

A. 4 H₃ BO₃ + 2 NaOH → Na₂B₄O₃ + 7H₂O
B. 4 H₃ BO₃ + NaOH → Na₂B₄O₃ + 4H₂O
C. 2 H₃ BO₃ + 4 NaOH → 2Na₂B₄O₃ + 5H₂O
D. 3 H₃ BO₃ + NaOH → Na₂B₄O₃ + H₂O

35. Which of the following elements of group IIIA has non-metallic character? (NET 2015)

A. B
B. In
C. Tl
D. Ga

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