Question

If water samples taken from the sea, rivers, lakes or snow-capped mountains, are found to contain hydrogen and oxygen in the ratio of $1:8$. This demonstrates:

• A. The law of chemical equilibrium
• B. The law of definite proportions
• C. Avogadro's law
• D. The modern periodic law

Answer 1

Answer: (B)

The law of definite proportions

The law of definite proportion states that a given chemical compound always contains its component elements in a fixed ratio (by mass) and this ratio does not change if we change the source or method of preparation. In all the water samples, taken from the sea, rivers, lakes or snow-capped mountains, the hydrogen and oxygen ratio is constant, clearly demonstrating the law of definite proportions.