135. For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to C

_{p}^{n}, then what is the value of 'n' for this chemical reaction136. If in the gaseous phase reaction, N

_{2}O_{4}⇋ 2NO_{2}, x is the part of N_{2}O_{4}which dissociates, then the number of molecules at equilibrium will be138. Holding time for flow reactors is __________ the space time, for constant fluid density

139. To maximise the formation of R in the simultaneous reaction

A + B → R , r

A + B → S , r

We should have

A + B → R , r

_{R}= 2C_{A}^{0.5}.C_{B}^{2}A + B → S , r

_{S}= 1.5 C_{A}.C_{B}We should have

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