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At room temperature (20^@C) milk turns s...

At room temperature `(20^@C)` milk turns sour in about 65 hours. In a refrigerator at `3^@`C milk can be stored three times as long before its sours. Estimate : (a) Activation energy of the reaction that causes the souring of milk, (b) How long should it take milk to sour at `40^@`C.

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