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Question 16 - MCQs from NCERT Exemplar - Chapter 3 Class 10 - Metals and Non-Metals

Last updated at Dec. 16, 2024 by Teachoo

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

(A) CuSO 4

(B) CuCO 3

(C) Cu(NO 3 ) 2

(D) CuO

 

Answer

Copper corrodes in the presence of air and moisture . 

Because of the CO 2 and O 2 present in the air, Cu reacts with them to form CuCO 3  which is green in color.

The reactions take place as:

                                     

So, the correct answer is (b) CuCO 3

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals

    3. MCQs from NCERT Exemplar

    Chapter 4 Class 10 - Carbon and its Compounds →
Chapter 4 Class 10 - Carbon and its Compounds →
Class 10
Chapter 3 Class 10 - Metals and Non-Metals

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo