Class VIII

Materials around us can be classified into
  1. Elements and compounds
  2. Metals and non-metals
  3. Acids and bases
  4. None of these
The most reactive metal is:
  1. iron
  2. gold
  3. zinc
  4. potassium
Metal oxides are of nature
  1. Acidic
  2. Basic
  3. Neutral
  4. All of these.
All metals are solids except
  1. sodium
  2. Calcium
  3. Mercury
  4. Hydrogen.
The metal which can be cut with a knife
  1. Sodium and potassium
  2. Barium and calcium
  3. Sodium and mercury
  4. Potassium and calcium.
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