metals and non-metals Science - metals and non-metals

• A
  $NaCI$ solution and copper metal
• B
  $MgCl2$ solution and aluminium metal
• C
  $FeSO4$ solution and silver metal
• ✓
  $AgNO3$ solution and copper metal

Answer: D.

• A
  Corrosion of copper takes place by contact with air and water.
• ✓
  The melting points and boiling points of metals are low.
• C
  The method to convert carbonate containing ore to metal oxide is called calcination.
• D
  The displacement of less active metals from their solution takes place by more active metal.

Answer: B.

• A
  $Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)$
• B
  $Zn(s) + FeSO4(aq) → ZnSO4(aq) + Fe(s)$
• C
  $Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)$
• ✓
  $Cu(s) + FeSO4(aq) → CuSO4(aq) + Fe(s)$

Answer: D.

• A
  Solution of $NaCl +$ coin of copper
• B
  Solution of $MgCl2 +$ coin of aluminium
• C
  Solution of $FeSO4 +$ coin of silver
• ✓
  Solution of $AgNO3 +$ coin of copper

Answer: D.

• A
  Metal + dilute sulphuric acid
• B
  Metal + dilute hydrochloric acid
• C
  Metal + dilute nitric acid
• ✓
  Metal + water

Answer: D.