Question

One part of an element A combines with two parts of B (another element). Six parts of element C combine with four parts of element B. If A and C combines together, the ratio of their masses will be governed by:

• A. law of definite proportions
• B. law of multiple proportions
• C. law of reciprocal proportions
• D. law of conservation of mass

Answer 1

The correct option is C law of reciprocal proportions

(i) $A+2B$, where one part of $A$ combines with two parts of $B$.

(ii) $6C+4B$, where six parts of $C$ combine with four parts of $B$.

If $A$ and $C$ combine; the ratio of their masses will be governed by the law of reciprocal proportion.

According to the law, if 2 different elements combine separately with the same weight of a third element the ratio of the masses in which they do so are either the same or a simple multiple of the mass ratio in which they combine.