LPT-0054
QUESTION
The presence of detergent in milk is detected by adding?
OPTIONS
(A) Ether
(B) Hydrochloric acid
(C) Acetic acid solution
(D) Bromocresol purple solution
ANSWER
(D) Bromocresol purple solution
EXPLANATION
Bromocresol purple can be used in a qualitative test for detergent adulteration because detergents alter the reaction and colour behaviour of the indicator system. Ether, hydrochloric acid, and acetic acid are used for other analytical purposes and are not the specified reagent here. Therefore, option (D) is correct.
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