Question

For a reaction $[R]\to P$ a graph of $[R]$ against time is found to be a straight line. What is the order of this reaction?

• A. Second order
• B. Third order
• C. First order
• D. Zero order

Answer 1

Answer: (D)

Since, the graph of $[R]vs$ time, $t$ is straight line, the order of reaction must be zero because for zero order reaction,
integrated rate equation is $[R]=-kt+\left[R_0\right]$
The slope of this graph is negative.