Question

The same proportion of hydrogen and oxygen in the water obtained from different sources proves the law of:

• A. electrons are negatively charged
• B. electrons are universal constituents of matter
• C. electrons are the lightest of all particles
• D. Mass of the electrons is of the mass of H-atom

Answer 1

The correct option is B electrons are universal constituents of matter

The same proportion of hydrogen and oxygen in the water obtained from different sources proves the law of definite proportion.
The Law of Definite Proportions can be stated as: "A pure chemical compound prepared by any method consists of the same elements combined together in a fixed proportion by mass".