Practice question

Given: A reaction’s rate increases by a factor of 8 when [A] is doubled and [B] is doubled. If the order with respect to B is 1, what is the order with respect to A? These values define the system as per NCERT data. Formula: Rate = k[A]^n[B]^m, m = 1, 8 = 2^n × 2¹. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: 8 = 2^{n+1, n + 1 = 3, n = 2 . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.