Question

Which one of the following formula represents a first order reaction.

• A. $K = \frac{x}{t}$
• B. $K = \frac{1}{2t}\left\lbrack \frac{1}{(a - x)^{2}} - \frac{1}{a^{2}} \right\rbrack$
• C. $K = \frac{2.303}{t}\log_{10}\frac{a}{(a - x)}$
• D. $K = \frac{1}{t}\frac{x}{a(a - x)}$

Answer 1

Answer: (C)

$K = \frac{2.303}{t}\log_{10}\frac{a}{(a - x)}$

Answer 2

For 1^st order reaction $K = \frac{2.303}{t}\log_{10}\frac{a}{(a - x)}$ .