NEET Chemistry Question (2026) — Solution

Step-by-step solution

From the given graph, the plot of concentration [R] versus time t is a straight line with a negative slope. The equation for this straight line can be written as: y = mx + c [R] = ( slope ) t + intercept Given that the intercept is [R_0] and the slope is -k, the equation becomes: [R] = -kt + [R_0] This equation represents the integrated rate law for a zero-order reaction. For a zero-order reaction, the rate of reaction is independent of the concentration of the reactant: Rate = - d[R] dt = k[R]^0 = k Integrating both sides: _ [R_0] ^ [R] d[R] = -k _0^t dt [R] - [R_0] = -kt [R] = -kt + [R_0] Since the graph matches this equation, the order of the reaction is 0. Answer: 0