NEET2026ChemistryChapterActual
The given graph represents the kinetics of a reaction, showing a straight line passing through the origin. The y and x axes for zero and first order reactions, respectively, can be correctly identified as:
Options
- Azero order ( y = rate , x = concentration ), first order ( y = t_ 1/2 , x = initial concentration )
- Bzero order ( y = t_ 1/2 , x = initial concentration ), first order ( y = rate , x = concentration )
- Czero order ( y = concentration , x = time ), first order ( y = [R] , x = time )
- Dzero order ( y = rate , x = time ), first order ( y = t_ 1/2 , x = rate )
Correct answer
B. zero order ( y = t_ 1/2 , x = initial concentration ), first order ( y = rate , x = concentration )
Step-by-step solution
The given graph is a straight line passing through the origin, which represents an equation of the form y = mx . For a zero-order reaction, the half-life is given by: t_ 1/2 = [A]₀ 2k If we plot y = t_ 1/2 against x = [A]₀ (initial concentration), we get a straight line passing through the origin with a slope of 1 2k . For a first-order reaction, the rate law is given by: Rate = k[A] If we plot y = Rate against x = [A] (concentration), we get a straight line passing through the origin with a slope of k . Let us che