An instrument to detect the purity of milk is____________?
Correct answer: A. Lactometer
- A. Lactometer
- B. Hygrometer
- C. Manometer
- D. Sonometer
Explanation
A lactometer measures the density or specific gravity of milk, helping detect dilution or some forms of adulteration. Hygrometers measure humidity, while manometers measure pressure.
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Chemical principles appear in acids, bases, salts, solutions, oxidation, combustion, corrosion and neutralisation, along with the composition and uses of common substances. Coverage includes soaps and detergents, fertilizers, medicines, food preservatives, polymers, fuels and water treatment, while distinguishing physical changes from chemical reactions.
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