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.

 

Also

  • 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

 

Thus,

  • Assertion is true
  • Reasoning is false



So, the correct answer is (c)  

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  2. Solutions to CBSE Sample Paper - Science Class 10
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Solutions to CBSE Sample Paper - Science Class 10
  • Solutions - CBSE Class 10 Sample Paper for 2022 Boards - Science [MCQ]

About the Author

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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