group 1 and 2 compounds

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  • Created by: danni :)
  • Created on: 29-05-13 10:46

1. Which of the following trends going down group 7 from chlorine to iodine is not true?

  • their compounds with hydrogen are acids
  • their anions of formula X− form precipitates with aqueous silver ions
  • the strength of the halogen as an oxidising agent increases
  • the first ionisation energy becomes less endothermic
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2. A compound X gives a lilac flame. When its aqueous solution is added to silver nitrate solution a cream precipitate that does not dissolve in dilute ammonia but does dissolve in concentrated ammonia is produced. Compound X is

  • potassium bromide
  • calcium iodide
  • potassium iodide
  • calcium bromide

3. group 1 carbonates

  • get more thermally stable as you move down the group
  • dont decompose
  • get less thermally stable as you move down the group

4. Radium occurs below barium in group 2. On the basis of the trends in the chemistry of group 2, which of the following statements is true?

  • Radium sulfate is more soluble in water than magnesium sulfate.
  • Radium carbonate is more easily decomposed by heating than magnesium carbonate.
  • Radium hydroxide is more soluble in water than calcium hydroxide
  • Radium carbonate is very soluble in water.

5. Which of the following decomposes on heating to give a single gas which is acidic?

  • LiNO3
  • Li2CO3
  • NaNO3
  • Na2CO3
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