Chemical Reaction Engineering Questions and Answers – Reaction Rates – 2

This set of Chemical Reaction Engineering Interview Questions and Answers focuses on “Reaction Rates – 2”.

1. For a homogeneous reaction of order n, the unit of rate constant, k is ____
a) conc^n-1
b) \(\frac{conc^{-1}}{time} \)
c) \(\frac{conc^{-1}}{time^{1-n}} \)
d) \(\frac{conc^{1-n}}{time^{-1}} \)
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2. The unit of rate constant, k for a first order reaction is ____
a) (time)^-1
b) mol. time
c) \(\frac{mol}{m^3} \)
d) \(\frac{mol}{m^3×s} \)
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3. Which among the following reactions is elementary?
a) A + B → R; (-r_A) = k C_AC_B
b) 2A + B → R; (-r_A) = k C_A²
c) 2A + B → R; (-r_A) = k C_AC_B²
d) A + B → R; (-r_A) = k C_B
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4. An example of pseudo first order reaction is ____
a) Hydrolysis of an ester to a carboxylic acid using water
b) NO₂ + CO → NO + CO₂
c) N₂O₅ → NO₂ + 1/2 O₂
d) 2NO + H₂ → N₂O + H₂O
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5. The study of rates at which chemical reactions occur and the effect of various parameters on the rate are termed as ____
a) Chemical Technology
b) Chemical Sciences
c) Chemical Kinetics
d) Fluid Mechanics
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6. The rate of reaction is rapid for which of the following reactions?
a) Cellular reactions
b) Reactions in coal furnaces
c) Reactions in rocket engines
d) Gas reactions in porous catalysts
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7. For the reaction 3A+2B → R, which of the following expressions is valid?
a) \(\frac{-r_A}{3}\)=\(\frac{-r_B}{2}\)=\(\frac{r_C}{1}\)
b) \(\frac{-r_A}{3}\)=\(\frac{-r_B}{2}\)=\(\frac{r_C}{1}\)
c) \(\frac{-r_A}{1}\)=\(\frac{-r_B}{1}\)=\(\frac{r_R}{1}\)
d) \(\frac{-r_A}{3}\)=\(\frac{-r_B}{4}\)=\(\frac{r_C}{1}\)
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8. Which among the following reactions is elementary?
a) Ester formation from ethanol and acetic acid
b) Formation of Hydrogen Bromide
c) Decomposition of acetaldehyde to give methane and carbon monoxide
d) Formation of Hydrogen Iodide
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9. The molecularity of the reaction A+2B → R, (-r_A) = k C_AC_B² is ____
a) 2
b) 1
c) 3
d) 0
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10. Order of the reaction (-r_A) = kC_A^a.C_B^b is ____
a) a
b) b
c) a-b
d) a+b
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Sanfoundry Global Education & Learning Series – Chemical Reaction Engineering.

To practice all areas of Chemical Reaction Engineering for Interviews, here is complete set of 1000+ Multiple Choice Questions and Answers.