2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.5
The Halogens and The Noble Gases
Total MCQs = 48
21. Radon is used in radio therapy. It ‘s best source is: (DGK 2014)(GRW 2015)
A. Liquefaction of air
B. Radioactive decay of Ra – 226
C. Fractional distillation of mixtrue of noble bases
D. All
Answer:
D. All
22. Gas used as a cooling medium for nuclear reactor is : (RWP 2014)
A. H2
B. Cl2
C. He
D. SO2
Answer:
C. He
23. Which of the following hydrogen halide is the weakes acid in solution? (MTN 2016)(SGD, BWP 2017)(SWL 2019)
A. HF
B. HBr
C. HI
D. HCl
Answer:
A. HF
24. Chlorine heptaoxide(Cl2O7) reacts with water to form? (LHR 2017 GII)(DGK 2018 GII)( BWP 2019 GII)
A. Hypochlorous acid
B. Chloric acid
C. Perchloric acid
D. Chlorine and oxygen
Answer:
C. Perchloric acid
25. Hydrogen bond the strongest between the molecules of: (SWL,BWP 2015)(DGK 2016,2018)(SGD 2016,2017,2018)(GRW 2018) (AJK,LHR 2019)
A. HF
B. HCl
C. HBr
D. HI
Answer:
A. HF
