The instrument to measure the relative density of liquid is
A
thermometer
B
hydrometer
C
spring balance
D
beaker
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Thermometer is used to measure temperature
Hydrometer is used to measure relative density of liquid.
Spring balance is used to measure the weight of an object
Beaker is used to measure or take volume of a liquid
Source: Myschool Past Questions Archive (Record #46436)