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Explain the curding of milk when it is s...

Explain the curding of milk when it is sour.

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Souring of milk takes place when lactose which is a milk sugar undergoes fermentation to release lactic acid. The acid causee the coagulation of the fat contents present in milk resulting in the formatin of the curd.
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Souring of milk is due to -

Curding of milk take place by

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.

How does souring of milk occur ?

Milk turns sour at 40^(@)C three times as faster as 0^(@)C . Hence E_(a) in cal of process of turning of milk sour is :

If a few drops of lemon are put in the milk, it has turned sour.

DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
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  4. What is purple of casis ?

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  15. Why does a beam of light on passing through a colloidal solution have ...

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  16. Milk is an emulsion of fat dispersed in Water. What stabiliser stabili...

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  17. Can the same substance act both as colloid and crystalloid ?

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  18. If a strong beam of light is passed through a colloidal sol place in a...

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