2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.4
Group 5A and 6A Elements
Total MCQs = 47
26. laughing gas is chemically (GRW 2017) (DGK 2018) (LHR 2019) (FSD 2018) (SGD 2018, 2019 GII) (RWP, AJK 2019)
A. NO
B. N2O
C. NO2
D. N2O4
Answer:
B. N2O
27. Out of all the elements of group VA, the highest melting and points is shown by the element. (DGK 2019 GII)
A. Te
B. Se
C. S
D. Pb
Answer:
A. Te
28. SO3 is not absorbed in water directly to from H2SO4 because (GRW 2015)
A. The reation does not go to completion
B. The reaction is quite slow
C. The reation is highly exothermic
D. SO3 is insoluble in water
Answer:
C. The reation is highly exothermic
29. Which catalyst is used in contact process? (GRW 2016) (SGD 2016, 2017) (LHR , MTN 2017, 2018) (AJK 2019) (SWL 2018, 2019)
A. Fe2O3
B. V2O5
C. SO3
D. Ag2O
Answer:
B. V2O5
30. Which of the following speice has the maximum number of unpaired electron? (DGK 2017) (MTN, BWP 2019 GII)
A. O2
B. O+ 2
C. O– 2
D. O2- 2
Answer:
A. O2
