Question

please solve this question friends

Answer 1

a... because if the medium of milk would be acidic then Lactobactor microorganism would make the milk sour in taste.
b... because the nature of this milk is basic and it will take time to be acidic again.
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Answer 2

(a)He shift the ph of milk from 6 to alkaline so that he can keep it for longer time and hence the milk dosent turn to curd
(b)with the additin of baking soda the milk became basic so its react with the acid and is neutralised,hence it takes long time to change as curd.

Hope it helps!!