SELECT * FROM question_mgmt as q WHERE id=3570 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=254 and ex_no='6' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Metals and Non-Metals give reasons why copper is used to make hot water

Question:

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

Answer:

Iron react with steam, whereas copper does not reat with cold water, hot water, or steam. So, hot water tanks are made of steel (an alloy of iron), then iron reacts with the steam formed by hot water.

     3Fe       +       4H2O       →       Fe3O4       +       4H2
     Iron               Steam           Iron(II,III)oxide      Hydrogen

Therefore copper is used to make hot water tanks, and not steel.


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