Question

Straight line graph for first order reaction is obtained between ____________.

Options

• Log[R₀] and t

• [R] and t

• ln[R] and t

• None of these

Answer 1

Straight line graph for first order reaction is obtained between ln[R] and t.

Explanation:

We know that, t = `1/"k" ln  (["R"_0])/(["R"]) ln ["R"] = ln ["R"_0] - "kt"`

on comparing with equation of line, y = mx + c

y = ln[R], x = t, m = slope = −k, intercept = ln[R₀]

graph between ln[R] and t will be straight line with negative slope.