Solutions - CBSE Class 10 Sample Paper for 2022 Boards - Science [MCQ]

Class 10
Solutions to CBSE Sample Paper - Science Class 10

Assertion: Fresh milk in which baking soda is added, takes a longer time to set as curd. 

Reason: Baking soda decreases the pH value of fresh milk to below 


Answer - 

Milkman putting Baking Soda in Milk-01.jpg

  • Fresh milk in which baking soda is added is more alkaline in nature,  
  • therefore, acid produced to set into curd will be neutralized by baking soda added by milkmen.  
  • Hence, it takes a longer time to set as curd.



  • After adding baking soda to the milk, it becomes more alkaline in nature, i.e, basic in nature.
  • So, pH of the milk would be increased to above 7



  • Assertion is true
  • Reasoning is false

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