Govt Exams
Overall order = sum of exponents in rate law = 1 + 2 = 3 (third order reaction)
The rate-determining step (slowest step) controls the overall reaction rate, regardless of how many fast equilibrium steps precede it
For zero-order reaction: [A]₀ - [A]ₜ = kt. So 0.5 - 0.1 = 0.02 × t, giving t = 20 s
The exponent of [NO] in the rate law is 2, making the reaction second order with respect to NO
According to collision theory, collisions must have both proper spatial orientation and energy ≥ activation energy to result in a reaction.
Activation energy is the minimum energy required for reactants to overcome the energy barrier and form products. It is always positive and independent of temperature.
The units s⁻¹ or time⁻¹ indicate a first-order reaction. For first-order reactions, the rate constant has units of time⁻¹.
For a zero-order reaction, t₁/₂ = [A]₀/(2k), which is directly proportional to initial concentration.
The color of the reaction vessel does not affect the reaction rate. Temperature, nature of reactants, concentration, pressure, and catalyst are actual factors affecting reaction rate.
Color of a solution is a physical property unrelated to ionic conductance. Conductance depends on nature of solute, concentration, temperature, and solvent.