Chemical Reaction Engineering Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because Of high calcination temperature CO₂ escapes continuously CaO is more stable than CaCO₃ CaO is not dissociated Of high calcination temperature CO₂ escapes continuously CaO is more stable than CaCO₃ CaO is not dissociated ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering According to Arhenious equation of temperature dependency of rate constant for an elementary reaction K ∝ e-E/RT K ∝ T e-E/RT None of these K ∝ √T K ∝ e-E/RT K ∝ T e-E/RT None of these K ∝ √T ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second) 1 1/(L√(K/D1)) L√(K/D1) ∞ 1 1/(L√(K/D1)) L√(K/D1) ∞ ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the Fraction of molecules having threshold energy increases Increased temperature reduces the activation energy Collision frequency increases Value of threshold energy decreases Fraction of molecules having threshold energy increases Increased temperature reduces the activation energy Collision frequency increases Value of threshold energy decreases ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The effect of increasing pressure on the gaseous equilibrium of the reaction 2X+3Y ⇋ 3X+2Y indicates that None of these Pressure has no effect Backward reaction is favoured Forward reaction is favoured None of these Pressure has no effect Backward reaction is favoured Forward reaction is favoured ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Exothermic reactions are best carried out in A CSTR CSTR followed by a plug flow reactor A plug flow reactor followed by CSTR CSTR in series A CSTR CSTR followed by a plug flow reactor A plug flow reactor followed by CSTR CSTR in series ANSWER DOWNLOAD EXAMIANS APP
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