JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
The reaction \(2X \to B\) is a zeroth order reaction. If the initial concentration of \(X\) is \(0.2\,M\), the half life is \(6\, h\). When the initial concentration of \(X\) is \(0.5\, M\), the time required to reach its final concentration of \(0.2\, M\) will be ........ \(hr\)
- A \(9.0\)
- B \(12.0\)
- C \(18.0\)
- D \(7.2\)
Answer & Solution
Correct Answer
(C) \(18.0\)
Step-by-step Solution
Detailed explanation
For zero order reaction \({C_o}\, - \,{C_t}\, = \,Kt\) \(0.5M\, - \,0.2M\, = \,Kt\) \(0.3\, = \,Kt\) ....... \((1)\) \('K'\) can be calculated by \({t_{1/2}}\, = \,\frac{{{C_o}}}{{2K}}\) \(6\, = \,\frac{{0.2}}{{2K}}\)…
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