Chemical Engineering Mcqs

The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a ‘tanks in series model’ comprising of ‘m’ tanks is equal to ___________________?

• (A)  m
• (B)  1/m
• (C)  √m
• (D)  m2

Answer

Submitted By :Ali Uppal

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is _______________?

• (A)  Zero
• (B)  One
• (C)  Two
• (D)  Three

Answer

Submitted By :Ali Uppal

Rate constant ‘k’ and absolute temperature ‘T’ are related by collision theory (for bimolecular) as______________________?

• (A)  k ∝ T1.5
• (B)  k ∝ exp(-E/RT)
• (C)  k ∝ √T
• (D)  k ∝ T

Answer

Submitted By :Ali Uppal

A back mix reactor is___________________?

• (A)  Suitable for gas phase reactions
• (B)  Ideal at very low conversion
• (C)  Same as plug flow reactor (PFR)
• (D)  Same as ideal stirred tank reactor

Answer

Submitted By :Ali Uppal

Transition state theory gives the rate constant as__________________?

• (A)  K α e-E/RT
• (B)  K α eE/RT
• (C)  K α T . e-E/RT
• (D)  K α √T . e-E/RT

Answer

Submitted By :Ali Uppal

In case of a/an ______________ chemical reaction, conversion increases with the rise in temperature?

• (A)  Reversible exothermic
• (B)  Irreversible exothermic
• (C)  Irreversible endothermic
• (D)  Reversible endothermic

Answer

Submitted By :Ali Uppal

The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called_________________?

• (A)  A ferment or an enzyme
• (B)  Haemoglobin
• (C)  Fungi
• (D)  None of these

Answer

Submitted By :Ali Uppal

From collision theory, the reaction rate constant is proportional to_________________?

• (A)  exp (-E/RT)
• (B)  exp (-E/2RT)
• (C)  √T
• (D)  Tm exp (-E/RT)

Answer

Submitted By :Ali Uppal

The unit of frequency factor in Arrhenius equation is_______________?

• (A)  Same as that of rate constant
• (B)  Same as that of activation energy
• (C)  Dimensionless
• (D)  None of these

Answer

Submitted By :Ali Uppal

The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called_________________?

• (A)  Operational yield
• (B)  Relative yield
• (C)  Selectivity
• (D)  None of these

Answer

Submitted By :Ali Uppal