Question

In which case we can not measure purity of milk with the help of Lactometer?

• A. Add a liquid in the milk, which is having lesser density.
• B. Add a liquid in the milk, which is having equal density.
• C. Add a liquid in the milk, which is having higher density.
• D. Lactometer can not fail to check purity of milk.

Answer 1

The correct option is B Add a liquid in the milk, which is having equal density.

Lactometer helps us to calculate density of milk, if there is any change in the value of density, we know that the milk is impure or mixed with some other liquid. But if a liquid is added in the milk which is having equal density of milk, Lactometer will not be able to differentiate between them.