Exercises for Topic Group 17 Chemistry
1. Which property of the halogens (from F to I) is represented by the above graph?
A Boiling point of the hydrogen halides, HX
B The atomic radius
C The electronegativity
D The X-X bond energy
2. Which of the following graphs represents correctly the variation of the bond energy in the hydrides of the halogens, H-X?
3. Which of the following properties increases with proton number for the Group 17 elements?
A First ionisation energy
B The standard electrode potential
C Atomic radius
D Electronegativity
4. Going down Group 17 of the Periodic Table
A the reactivity of the halogen as an oxidising agent increases
B the volatility of the hydrogen halides decreases
C the colour of the halogens gets lighter
D the acid strength of the H-X decreases
5. The volatility of the halogen decreases with increasing proton number because
A the enthalpy of vaporisation decreases
B the X-X bond becomes weaker
C the size of the X2 molecules increases
D the oxidising power decreases
6. All the properties listed below are true for fluorine except
A fluorine exhibits oxidation states ranging from -1 to +7 in its compounds
B HF is a weak acid
C fluorine is a strong oxidising agent
D fluorine exists as discrete F2 molecules
7. Which of the following graphs is correct for the variation of electronegativity with proton number for chlorine, bromine and iodine?
8. Which of the following species is the strongest reducing agent?
A CI2
B CIO3
C HI
D I2
9. Which of the following graphs represents the variation of the electronegativity with proton number for the halogens (F to I)?
10. Which is the strongest oxidising agent?
A CI-
B Br2
C I2
DI-
11. I2 is sparingly soluble in water but dissolves completely in aqueous potassium iodide. Which of the following explains this phenomenon?
A I2 reacts with KI to form I3-
B I2 reacts with KI to form I-
C I2 reacts with KI to form K3I
D I2 reacts with KI to form KIO3
12. The acid strength decreases in the order HI > HBr > HCI, because
A the reducing strength decreases in the order I- > Br- > Cl-
B the ionic size decreases in the order I- > Br- > Cl-
C the atomic size increases in the order Cl < Br < I
D the ionic character decreases in the order HI > HBr > HCI
13. Which of the following graphs of bond energy against proton number for the Group VII elements is correct?
14. Which of the following is not true with regards to bromine?
A Bromine is a volatile liquid
B Bromine fume is violet
C Liquid bromine is reddish brown
D Bromine is a covalent molecule
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