10 minutes maximum! Can you do it in 5?

1. The halogens are ...
  • A.   non-metal elements composed of diatomic molecules
  • B.   non-metal elements composed of individual atoms
  • C.   metal elements composed of diatomic molecules
  • D.  metal elements composed of individual atoms

2. Elements in Group 7 have similar chemical reactions because they have the same number of ...

  • A. electron shells
  • B. electrons
  • C. outer shell electrons
  • D. protons

3. The order of reactivity of the Halogens from most to least reactive is:

  • A. Fluorine, Chlorine, Bromine, Iodine
  • B. Iodine, Bromine, Chlorine, Fluorine
  • C. Chlorine, Bromine, Iodine, Fluorine
  • D. Bromine, Iodine, Fluorine, Chlorine

4+5. Predict the colour and the state of astatine given the following information:

Halogen Colour Physical State at room temperature
Fluorine yellow gas
Chlorine green gas
Bromine red-brown liquid
Iodine grey solid

6. Information on the melting and boiling points of some of the group 7 elements is given below. 
Use the information to predict a value for the boiling point of iodine.

Halogen Melting Point in OC Boiling Point in OC
Fluorine -220 -188
Chlorine -101 -35
Bromine -7 59
Iodine 114

7. Which one of the following reactions will take place?

  • A.  bromine + potassium iodide  potassium bromide and iodine
  • B.  bromine + potassium chloride  potassium bromide and chlorine
  • C.  iodine + potassium chloride  potassium iodide and chlorine
  • D.  iodine + potassium bromide  potassium iodide and bromine

Q8-10. Chlorine gas is bubbled into sodium bromide solution. 

The sodium bromide solution changes color indicating a reaction.


8. The reaction between chlorine and sodium bromide is a ...

  • A.  combustion reaction
  • B.  neutralization reaction
  • C.  substitution reaction
  • D.  displacement reaction

9. This reaction occurs because ...

  • A.  chlorine is more reactive than sodium bromide
  • B.  chlorine is less reactive than sodium bromide
  • C.  chlorine is more reactive than bromine
  • D.  chlorine is less reactive than bromine

10. The chemical equation for this reaction is ...

  • A. Cl + NaBr NaCl + Br
  • B. Cl2 + NaBr NaCl + Br2
  • C. Cl2 + 2NaBr  2NaCl + Br2  
  • D. Cl2 + 2NaBr  2ClBr + 2Na