Class 10
Chapter 3 Class 10 - Metals and Non-Metals

Question 3 - Assertion Reasoning Questions (MCQ) - Chapter 3 Class 10 - Metals and Non-Metals

Last updated at Dec. 16, 2024 by

Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.  

Reason (R): Carbon dioxide is given off in the reaction.  

Answer 

  • When sodium carbonate is added to dilute hydrochloric acid, a displacement reaction takes place. 
  • Sodium is more reactive than Hydrogen (check reactivity series )
  • So it replaces Hydrogen from its solution to form Sodium Chloride solution
  • Hydrogen forms HCl  and CO 2 is released in gaseous form. 

The reaction is as follows:        

Reaction of Sodium Carbonate with Dil, HCl - Teachoo.png

Thus, 

  • The Assertion is True.
  • Reason is also True.

And the Reason is the correct explanation for the assertion.  

So, the correct answer is (a)

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