SELECT * FROM question_mgmt as q WHERE id=3556 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 which of the following methods is suitable for pre

Question:

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

(a) Applying grease
(b) Applying paint
(c) Applying a coating of zinc
(d) All of the above.

Answer:

(c) Applying a coating of zinc

(Rusting can be prevented by applying grease and oil. But, in case of an iron frying pan, grease and paint cannot be applied because when the pan is heated and washed again and again, the coating of grease and paint gets destroyed. Therefore Zinc coating is done i.e. galvanisation to prevent rusting.)


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