Question

why does the milk take longer time to become curd​

Answer 1

$\huge\star\mathfrak\red{{Hey Mate...!!}}$

As this milk is slightly more alkaline than other, therefore, acid produced to set into curd will be neutralized by baking soda added by milkman. Hence, this milk takes a longer time to set as curd.

Answer 2

Answer:

because bacteria which turn milk into the curd need time to multile themselves