Mnemonics: Chemical Kinetics | Chemistry Class 12 - NEET PDF Download

1. Factors affecting rate of reaction

Mnemonic: "Cool Cats Play Tennis Daily"

• C → Concentration
• C → Catalyst
• P → Pressure (for gases)
• T → Temperature
• D → Nature of reactants (and sometimes surface area)

2. Order of reaction basics

Mnemonic: "Zero First Second — Straight Curve Steeper"

• Zero order: Straight line (rate independent of concentration)
• First order: Curve when plotting concentration vs. time, straight line when plotting log[A] vs. time
• Second order: Curve steeper than first order, straight line for 1/[A] vs. time

3. Arrhenius equation parameters

Equation: k=Ae^−Ea​/RT
Mnemonic: "Kangaroos Are Energetic Runners"

• K → Rate constant (k)
• A → Frequency factor
• E → Activation energy (Ea)
• R → Gas constant (R)

4. Collision theory conditions

Mnemonic: "Correct Energy + Correct Aim = Reaction"

• Molecules must collide with enough energy (≥ Ea)
• Molecules must collide with proper orientation

5. First-order reaction half-life

Formula: $t1/2=0.693/kt\_\{1/2\}\; =\; 0.693\; /\; k$t1/2​=0.693/k
Mnemonic: "Half-life is 0.693 KILLER"
(K — rate constant, so 0.693/k)

6. Integrated rate law recognition

• Zero order: $\left[A\right]=\left[A\right]\mathrm{<sub\; style="font-size:\; 12px\; !important">0</sub>}-kt$→ Linear drop in concentration
• First order: $\ln \left[A\right]=\ln \left[A\right]\mathrm{<sub\; style="font-size:\; 12px\; !important">0</sub>}-kt$→ Logarithmic decay
• Second order: $1/\left[A\right]=1/\left[A\right]\mathrm{<sub\; style="font-size:\; 12px\; !important">0</sub>}+kt1/[A]\; =\; 1/[A]\_0\; +\; kt$→ Reciprocal increases

Mnemonic for order recognition: "Straight, Log, Reciprocal"