Name: Electrolytic Refining
Uploaded: 2019-07-19
Duration: 4 min 54 s
Description: The concept discusses the applications of electrolysis. It also explains how electrolysis is used in obtaining the pure form of a metal. Watch this video to...

Question

Write the precautions to be taken in the experiment to show air and water are essential for rusting iron articles, and also write the experimental procedure.

Accepted Answer

Both air and water are required for rusting.

An experimental procedure for testing rusting of iron articles are given below.

Take three test tubes and mark them A, B, and C and keep one nail in each test tube. To test tube A, add some water and close it with a cork.

In the second test tube B it should not contain dissolved air, So pour some oil with boiled water, which prevents entry of air in water.

In the third test tube, C has to put some anhydrous calcium chloride and close it with the help of cork. In a test tube, it is absorbed with air and moisture with drying agent Anhydrous calcium chloride. Now undisturbed these test tubes for some days.

After completing some days. In a test tube, A nail will get rusted due to exposure to both water and air.

In test-tube B the nail does not rust because there is no water only air was present in the test tube.

In C test tube the nail will not get rusted due to the air being dry and water being absent.

Write the precautions to be taken in the experiment to show air and water are essential for rusting iron articles, and also write the experimental procedure.

Important Questions on Principles of Metallurgy

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