In vacuum concentration or normal concentration, the soluble solid content is determined by _____
(a) Refractometer
(b) Hydrometer
(c) Refractometer & Hydrometer
(d) Neither of the mentioned
The question was posed to me in a national level competition.
Enquiry is from Principles of Food Concentrates-2 in section Principles of Food Preservation by Canning and Drying and Principles of Food Concentrates of Food Engineering