Time allocation: Chemical Kinetics questions in NEET are typically numerical (Arrhenius, half-life) or conceptual (order vs molecularity). Numerical questions should take 60–90 seconds; conceptual questions 30–45 seconds.

High-yield topics (attempt these first):

1. First-order half-life calculation from $k$, or $k$ from $t_{1/2}$
2. Percentage completion using half-life chain (50/75/87.5%)
3. $E_a$ from two rate constants at two temperatures (Arrhenius two-temperature form)
4. Order vs molecularity conceptual distinction

Quick identifiers:

• If the question says "radioactive decay / $H_{2}O_{2}$ / $N_{2}O_{5}$ decomposition" → first order
• If the question says "$NH_{3}$ on Pt at high pressure" → zero order
• If the question gives two temperatures and two $k$ values → use Arrhenius two-temperature form
• If the question asks "unit of rate constant" → apply $k = (mol\,L^{-1})^{1-n}\,s^{-1}$
• If the question says "pseudo first-order" → one reactant in large excess

Trap avoidance:

• Check whether half-life is concentration-dependent before applying any formula
• Always convert temperature to Kelvin before Arrhenius calculations
• Verify the sign: $(1/T_1 - 1/T_2)$ with $T_1 < T_2$ must give a positive value, so $E_a > 0$
• $\log 2 = 0.301$, $\log 3 = 0.477$, $\log 4 = 0.602$ — memorise these; they recur in every exam

Elimination strategy: For order-of-magnitude questions about $E_a$, most organic reactions have $E_a$ in the range 40–150 kJ/mol. If a calculation gives a value outside this range, recheck the sign or the unit conversion.

Last 5-minute revision items: $t_{1/2} = 0.693/k$ · $\log(k_2/k_1) = (E_a/2.303R)(1/T_1 - 1/T_2)$ · catalyst lowers $E_a$ not $\Delta H$ · molecularity cannot be zero or fractional.