प्रथम कोटि की अभिक्रिया के लिए t 1 / 2 = k/ a
t 3 / 4 = 2 t 1 / 2
t 1 / 2 = 0.693/ k
t 1 / 2 = k × 0.693

Options

A. `t_(1//2)=k/a`
B. `t_(3//4)=2t_(1//2)`
C. `t_(1//2)=(0.693)/(k)`
D. `t_(1//2)=k xx 0.693`

Answer

B, C