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Select the correct statement out of P, Q and R for zero order reaction.
(P) Quantity of the product formed is directly proportional to time
(Q) Larger the initial concentration of the reactant, greater the half-life period
(R) If 50% reaction takes place in 100 minutes, 75% reaction takes place in 150 minutes.

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P only

P and Q only

Q and R only

P, Q and R

answer is D.

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Detailed Solution

$(P) x = k t$

$(Q) t_{1 / 2} \propto a_{0}$

$(R) t_{1 / 2} = \frac{a}{2 k} = 100 \min$

$\begin{array}{l} \frac{a}{4} = a - t_{3 / 4} \times k \\ \Rightarrow t_{3 / 4} = \frac{3 a}{4 k} = 150 \min \end{array}$

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