0.03 sec⁻¹
0.03 min⁻¹
0.03 hr⁻¹
0.05 min⁻¹
✅ The correct answer is option B.
Chemical Engineering MCQs
A photochemical reaction is
Accompanied with emission of light
Catalysed by light
Initiated by light
All of the above
✅ The correct answer is option C.
The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called
Operational yield
Relative yield
Selectivity
None of these
✅ The correct answer is option C.
Half life period of a first order irreversible reaction A → B is
K/2
Ln k/2
Ln 2/k
Ln 0.5/k
✅ The correct answer is option C.
If CA is the quantity of reactants initially present, the quantity left after ‘n’ half periods will be equal to
(CA)n
(1/2)n.CA
(CA)1/n
(CA)1/2n
✅ The correct answer is option B.
Helium-mercury method is used for the measurement of the __________ of the catalyst.
Surface area
Porosity
Pore volume
Both B & C
✅ The correct answer is option D.
Rate of a chemical reaction is not influenced by the
Catalyst
Temperature
Reactants concentration
Number of molecules of reactants taking part in a reaction
✅ The correct answer is option D.
If helium is introduced in a reactor containing O₂, SO₂ and SO₃ at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO₃ (as per Le Chatlier principle)
Decreases
Increases
Remains unaltered
Changes unpredictably
✅ The correct answer is option A.
For a __________ order reaction, the units of rate constant and rate of reaction are the same.
Zero
First
Second
Fractional
✅ The correct answer is option A.
A catalyst is said to be a negative catalyst, ifit
Retards the rate of reaction
Reduces the value of equilibrium constant
Does not initiate the reaction
All of the above
✅ The correct answer is option A.