7731. For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.
8
12
16
32
✅ The correct answer is option C.
Chemical Engineering
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7732. On application of pressure to the equilibrium system, ice ⇋ water; which of the following phenomenon will occur?
Water will evaporate
Equilibrium will not be attained
More ice will be formed
More water will be formed
✅ The correct answer is option D.
7733. For an autocatalytic reactor, the suitable reactor set up is
P.F. reactors in series
CSTR in series
CSTR followed by P.F. reactor
P.F. reactor followed by CSTR
✅ The correct answer is option C.
7734. Autocatalytic reactions are best carried out in a
CSTR
CSTR in series
Plug flow reactor
Recycle reactor
✅ The correct answer is option D.
7735. Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is rR/rS = (k₁/k₂).Csub>Aa-b
Use high pressure and eliminate inerts, when a > b
Avoid recycle, when a > b
Use batch reactor or plug flow reactor, when a > b
Use CSTR with a high conversion, when a > b
✅ The correct answer is option B.
7736. Considering the endotheomic dissociation of CaCO₃ in a closed vessel (CaCO₃ ⇋ CaO + CO₂), the pressure of CO₂ increases, if
A catalyst is added
The temperature is increased
An inert gas is pumped keeping the temperature constant
None of these
✅ The correct answer is option B.
7737. From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is
K cal
K cal/°K
°K
K cal. °K
✅ The correct answer is option C.
7739. In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO₂ to SO₃ is accomplished by a __________ reaction.
Non-catalytic homogeneous
Non-catalytic heterogeneous
Catalytic homogenous
Catalytic heterogeneous
✅ The correct answer is option C.
7740. Pick out the wrong statement
For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR
Two mixed reactors of unequal size are available for producing a specified product, formed by a homogenous second order reaction. To achieve maximum production rate, the smaller reactor should be plac
Arrehenius equation describing the effect of temperature on rate constant is given by, K = A.e-Ea/RT
The mechanism for the decomposition of CH₃CHO into CH₄ and CO in presence of I₂ is:
CH₃CHO +I₂ CH₃I + HI + CO; slow
CH₃I + HI CH₄ + I₂; fast
Then the rate of disappearance
CH₃CHO +I₂ CH₃I + HI + CO; slow
CH₃I + HI CH₄ + I₂; fast
Then the rate of disappearance
✅ The correct answer is option D.