What is hydrometer. Explain in detail. How is it constructed in a laboratory. What are its uses? Share with your friends Share 0 Saloni answered this Hydrometer is based on Archimedes principle and is used to test how pure is the water 0 View Full Answer Kripa Nayak answered this Please answer fast 0 Kripa Nayak answered this N saloni thank u but I wanted the exact description for the question given 0