__________ °C के अंतर वाले दो अलग-अलग तापमानों पर किसी अभिक्रिया के दर स्थिरांकों के अनुपात को अभिक्रिया का तापमान गुणांक कहा जाता है।

For a first-order gas-phase reaction A(g) → B(g) + C(g), if the initial pressure of A is P0 and the total pressure of the system at time t is Pt, then the expression for the rate constant K is:

The correct relation between half-life (t1/2) and completion time (t100%) for zero order and first order reactions respectively is: