Class 10
Chapter 2 Class 10 - Acids, Bases and Salts

Assertion (A) : Ammonia solution is an alkali.  

Reason (R): Ammonia solution turns blue litmus  paper red.  


Directions: In the following questions, a statement  of assertion (A) is followed by a statement of  reason (R). Mark the correct choice as:  

(a) Both assertion (A) and reason (R) are true and  reason (R) is the correct explanation of assertion  (A).  

(b) Both assertion (A) and reason (R) are true but  reason (R) is not the correct explanation of  assertion (A).  (c) Assertion (A) is true but reason (R) is false.  

(d) Assertion (A) is false but reason (R) is true.  



Ammonia Solution turns red litmus Paper Blue - Teachoo-01.jpg


  • Ammonia solution is alkaline (i.e. basic)
  • And Bases turn red litmus paper to blue



  • Assertion is true
  • Reasoning is false , as Ammonia turns red litmus to blue

So, the correct answer is (c)

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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