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Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Detection of Adulteration in Milk

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1. The reaction between methylene blue and microorganism present in milk is:

a: Oxidation Explanation

Explanation

b: Reduction Explanation

Explanation

c: Dehydrogenation Explanation

Explanation

d: None of the above Explanation

Explanation

2. The presence of salicylic acid is indicated by the formation of:

a: Blue color Explanation

Explanation

b: Violet ring at the junction Explanation

Explanation

c: Violet color Explanation

Explanation

d: Pink color Explanation

Explanation

3. Why does the color change to pink when phenolphthalein indicator is added to milk ?

a: Milk is adulterated with table sugar Explanation

Explanation

b: Milk is adulterated with Soap Explanation

Explanation

c: Milk is adulterated with benzoic acid Explanation

Explanation

d: Milk is adulterated with starch Explanation

Explanation

4. What does it indicate when color of the milk is changed from blue to white immediately after incubation ?

a: Presence of large counts of bacteria in milk Explanation

Explanation

b: Absence of bacteria in milk Explanation

Explanation

c: Presence of bacteria in milk Explanation

Explanation

d: Presence of starch in milk Explanation

Explanation

5. Milk is adulterated with acid for:

a: To preserve the milk for longer period of time Explanation

Explanation

b: To increase the solid content of milk Explanation

Explanation

c: To increase the foaming of milk Explanation

Explanation

d: None of the above Explanation

Explanation

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