Metals Non-metals

Experiment:

To show that metals have high melting point.

Materials Required: Copper or aluminium wire, stand, clamp, Bunsen burner

Procedure:

  • Fix the copper wire in horizontal position with the help of stand and clamp.
  • Fix a nail with the help of wax below the wire at far end.
  • Put the Bunsen burner below the wire.
  • Heat the wire.
set for experiment to show high melting point of metal

Observation: The metal wire becomes very hot; as can be shown by the falling of nail.

Conclusion: Metals have high melting point.




Experiment

To show the nature of metallic oxide and non-metallic oxide.

Materials Required: Magnesium ribbon, sulphur powder, tongs, gas jar, litmus paper, etc.

Procedure:

  • Hold the magnesium ribbon with tongs, and burn the magnesium ribbon in air.
  • Collect the ashes produced on burning the magnesium ribbon.
  • Mix the ash in water and test with blue and red litmus paper.

Observation: There is no effect on blue litmus paper, but red litmus paper turns blue when it is dipped in aqueous solution of magnesium oxide.

Conclusion: Magnesium oxide is basic in nature. This means that metal oxides are basic in nature.

Procedure for Sulphur Powder:

  • Take sulphur powder in a China dish, and burn the powder.
  • Collect the fumes in a gas jar.
  • Introduce wet litmus papers in the gas jar.

Observation: Blue litmus paper turns red in presence of sulphur dioxide.

Conclusion: Non-metallic oxides are acidic in nature.




Experiment:

To show displacement reaction

Materials Required: Test tubes, copper sulphate solution, iron sulphate solution, copper wire, iron nail, corks, test tube stand

Procedure:

set up for experiment on displacement reaction
  • Fill a test tube with copper sulphate solution, and fill another test tube with iron sulphate solution.
  • With the help of a thread, suspend the iron nail in test tube which has copper sulphate solution.
  • With the help of a thread, suspend the copper wire in test tube which has iron sulphate solution.
  • Close the mouth of test tubes with cork, and put test tubes in test tube stand.

Observation: The colour of copper sulphate fades away and iron nail acquires a brown deposit. No change is observed in the test tube which has iron sulphate solution.

Conclusion: Iron displaces copper from copper sulphate solution. But copper is unable to displace iron from iron sulphate solution. This happens because iron is more reactive than copper.




Experiment:

To show metal's reaction with dilute acid

Materials Required: Test tube, water bath, cork, stand, clamp, dilute sulphuric acid, zinc granules

Procedure:

set up to show metal's reaction with dilute acid
  • Fix the test tube with stand and clamp. Insert a delivery tube in a cork, and take a water bath.
  • Take some zinc granules in the test tube.
  • Pour about 5 ml dilute sulphuric acid over zinc granules.
  • Just after pouring the acid, close the mouth of the test tube with cork; as shown in the given figure.

Observation: Effervescence can be seen in test tube. This shows some chemical reaction taking place. Bubbles can be seen coming from water bath; which shows that some gas is evolving.

Check the nature of gas: Bring a burning matchstick near the bubbles. You will observe that the matchstick burns with a pop sound. This indicates that the evolved gas is hydrogen gas.

Conclusion: When a metal reacts with dilute acid, metal salt and hydrogen gas is formed.

REF: All figures on this page are taken from NCERT text book for Class 10 Science






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