Question

The following diagram shows the changes in concentration for a reaction that goes to completion.

The equation for the reaction is:

• A. $A+B\to C$
• B. $A+C\to 2B$
• C. $A\to B+2C$
• D. $A\to 2B+C$

Answer 1

The correct option is D $A\to 2B+C$

From the graph we can see that the concentration of A is decreasing with respect to the time whereas concentration of B and C is increasing with respect to time. Hence, A is reactant and B and C are products. The skeletal equation we got is: $A\to B+C$
Now, from the graph it is clearly visible that the concentration of B is nearly double to that of concentration of C.
So the final reaction becomes $A\to 2B+C$
Hence, option D is correct.