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6. What's a common test for the Hydrogen Halides?

  • Form a white precipitate of Barium Halide when Barium Nitrate is added to a solution
  • Reacts with ammonia gas to form a dense white smoke of ammonium halide
  • Turns damp red litmus blue, then beaches it white
  • Turns Fehling's solution red

7. What is the trend in ionisation energy down group 2?

  • It increases up to Calcium then drops sharply
  • It increases due to the increased nuclear charge
  • It decreases due to the replusion and number of quantum shells increasing
  • It decreases due to the size of the metallic radius decreasing

8. Why is Mg (carbonate and nitrate) the least thermally stable of the G2 elements ?

  • Magnesium has the smallest ionic radius as a 2+ cation so a greater polarising ability (more charge dense)
  • Magnesium isn't the least thermally stable, Barium is.
  • Magnesium forms radioactive carbonates and nitrates that are unstable and break down
  • Magnesium has the largest nuclear charge so can most easily pull apart the electron cloud

9. What does Mg form on reaction with steam?

  • MgO (s) + H2 (g)
  • MgOH + H2
  • Mg(OH)2
  • It doesn't react as it is the least reactive of the group.

10. What is the definition of the first ionisation energy?

  • The energy required to remove an electron from each atom in one mole of gaseous atoms
  • The energy required to form an ion from one mole of atoms under standard conditions (100kPa and 298k)
  • The energy required to remove an electron from an atom
  • The energy required for one mole of atoms to attract one electron each in the gaseous state

11. What is disproportionation?

  • When one element undergoes both reduction and oxidation in a reaction at the same time
  • The action of a powerful reducing agent
  • A property of halides which decreases in ability down the group
  • When one atom both gains and looses electrons in a reaction

12. Caesium's flame colour is __(a)___ , Rubidium's is __(b)__ and Magnesium's is __(c)__

  • (a) Blue/Violet (b) Red/Purple (c) No colour
  • (a) Apple green (b) Lilac (c) No colour
  • (a)Orange (b) Brick Red (c) White
  • (a)Red (b) Yellow (c) Green

13. What is the trend in solubility of the sulfates and hydroxides?

  • They are less soluble down the group
  • Sulfates decreases down the group ; hydroxides increases
  • They are more soluble down the group
  • Hydroxides decreases down the group, Sulfates increases

14. Which of the following reactions could happen?

  • I2 + MgF2 --> F2 + MgI2
  • Cl2 + 2NaBr --> 2NaCl + Br2
  • Br2 + 2KCl --> 2KBr + Cl2
  • At2 + 2Cl- --> 2At- + Cl2

15. Group 1(Represented by X) decomposition of the nitrates is.... (except Li)

  • 2XNO3 --> NO2 + XNO2
  • 2X(NO3)2 --> 2XO + 4NO2 + O2
  • 2XNO3 --> 2XNO2 + O2
  • 4XNO3 --> 2X2O + 4NO2 + O2

16. What is the main interaction that determines the boiling point of the halogens?

  • Permanent dipole forces between molecules
  • London forces between molecules
  • Covalent bonds within molecules
  • Hydrogen bonds between molecules

17. Which of these is not a property that decreases down the halogen group?

  • Reducing ability
  • Electronegativity
  • Oxidising power
  • Reactivity

18. How does chlorine react with COLD AQUEOUS alkali?

  • Cl2 + 2NaOH --> 2NaCl + H2O
  • 3Cl2 + 6NaOH --> 5NaCl + NaClO3 + 3H2O
  • Cl2 + 2NaOH --> NaCl + NaClO + H2O
  • Cl2 + H2O --> HCl + HClO