1. Which of the following pairs will give displacement reactions?

  1. NaCl solution and copper metal
  2. MgCl2 solution and aluminium metal
  3. FeSO4 solution and silver metal
  4. AgNO3 solution and copper metal

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3. Which of the following statements is correct?

  1. All metals are ductile.
  2. All non-metals are ductile.
  3. Generally, metals are ductile.
  4. Some non-metals are ductile.

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4. Which of the following methods is suitable for preventing an iron frying pan from rusting?

  1. Applying grease
  2. Applying paint
  3. Applying a coating of zinc
  4. All of the above

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5. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be

  1. calcium
  2. carbon
  3. silicon
  4. iron

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6. Food cans are coated with tin and not with zinc because?

  1. zinc is costlier than tin
  2. zinc has a higher melting point than tin
  3. zinc is more reactive than tin
  4. zinc is less reactive than tin

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