In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be ______________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?

Related Mcqs:

For the irreversible elementary reactions in parallel as shown in the bellow figure, the rate of disappearance of ‘X’ is equal to_______________?

A. CA (K1 + K2) B. CA (K1 + K2)/2 C. CA . K1/2 D. CA . K2/2...

A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = – 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is_________________?

A. 2/3 kW B. 1 kW C. 5/3 kW D. 4 kW...

The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of _______________ order?

A. Zero B. First C. Second D. None of these...

In case of _____________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds?

A. Catalytic B. Parallel C. Series D. Auto catalytic...

In the reversible reaction of the type, A + B ⇌ AB, in general__________________?

A. Both forward and backward reactions will be exothermic B. Neither of the reactions will be endothermic C. The combination reaction will be exothermic, while the dissociation reaction will be endothermic D. The combination reaction will be endothermic, while the dissociation reaction will be exothermic...