Assertion (A): When a piece of copper metal is  added to dilute sulphuric acid, the solution turns  blue.  

Reason (R): Copper reacts with dilute sulphuric  acid to form blue copper (II) sulphate solution.  

 

Answer

  • When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue
  • Copper is more reactive than Hydrogen (check reactivity series )
  • So it replaces Hydrogen from its solution to form blue copper (II) sulphate solution
  • Hydrogen is liberated in gaseous form. 

 

The reaction is as follows:

Cu + H 2 SO 4 →CuSO 4 + H 2

 

Thus, 

  • Assertion is True.
  • Reason is also True.
  • And Reason is the correct explanation for the assertion.  

 

So, the correct answer is (a)  

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals (Term 1)
Class 10
Chapter 3 Class 10 - Metals and Non-Metals (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo