Question

The half-life period for a reaction at initial concentration of $0.5and1.0moleslitr{e}^{-1}are200secand100sec$
respectively.The order of the reaction is :

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

Answer: (C)

2

$t_{\frac{1}{2}}\alpha \frac{1}{a^{n-1}}\frac{200}{100}={\left(\begin{array}{c}\frac{1}{0.5}\end{array}\right)}^{n-1}$
$2=2^{n-1}n-1=1n=2$