GATE Chemical Engineering Exam>GATE Chemical Engineering Tests>GATE Chemical Engineering Mock Test - 7 - GATE Chemical Engineering MCQ
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30 Questions MCQ Test - GATE Chemical Engineering Mock Test - 7
GATE Chemical Engineering Mock Test - 7 for GATE Chemical Engineering 2025 is part of GATE Chemical Engineering preparation. The GATE Chemical Engineering Mock Test - 7 questions and answers have been prepared according to the GATE Chemical Engineering exam syllabus.The GATE Chemical Engineering Mock Test - 7 MCQs are made for GATE Chemical Engineering 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for GATE Chemical Engineering Mock Test - 7 below.
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GATE Chemical Engineering Mock Test - 7 - Question 1
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Select the sentence that is punctuated correctly:
- A.
My brother, who lives in Delhi is visiting us today.
- B.
My brother who lives in Delhi, is visiting us today.
- C.
My brother, who lives in Delhi, is visiting us today.
- D.
My brother who lives, in Delhi, is visiting us today.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 1
Non-restrictive clauses need to be separated by commas.
GATE Chemical Engineering Mock Test - 7 - Question 2
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Select the appropriate form of the verb:
The sun ____ rises in the east.
- A.
rise
- B.
rises
- C.
is rising
- D.
rose
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 2
The sun rising in the east is a fact, so the present simple tense "rises" is used.
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GATE Chemical Engineering Mock Test - 7 - Question 3
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Some individuals propose implementing Anti-Obesity Measures (AOM), such as showing calorie counts on restaurant menus. These measures, however, fail to confront the fundamental issues leading to obesity, including poverty and income inequality. Which of the following statements best encapsulates the essence of the passage?
- A.
AOM are addressing the core problems and are likely to succeed.
- B.
The proposed AOM addresses the core problems that cause obesity.
- C.
AOM are addressing the problem superficially.
- D.
If obesity reduces, poverty will naturally reduce, since obesity causes poverty.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 3
For summarizing the passage, the best suitable option is (C). As superficially means apparently/seemingly. Hence, the correct option is (C).
GATE Chemical Engineering Mock Test - 7 - Question 4
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Below are two statements labeled 1 and 2, along with two conclusions designated as I and II.Statement 1: All microorganisms are bacteria. Statement 2: All microorganisms are pathogens. Conclusion I: Some bacteria are pathogens.Conclusion II: Not all bacteria are pathogens.
Considering the statements and conclusions provided, which of the following options is logically accurate?
- A.
Only conclusion I correct.
- B.
Only conclusion II is correct.
- C.
Either conclusion I or II is correct.
- D.
Neither conclusion I nor II is correct.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 4
Given : S1 : All bacteria are microorganisms. S2 : All pathogens are microorganisms.According to the statement given in the question we can form Venn diagram as shown below, There are two possibilities,
Conclusion 1 : Some pathogens are bacteria. From fig. (a) conclusion 1 does not follow. Conclusion 2 : All pathogens are not bacteria. From possibility of case present in fig. (b) conclusion 2 does not follow. Hence, the correct option is (D).
GATE Chemical Engineering Mock Test - 7 - Question 5
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A circle A has a diameter of 3 cm, circle B has a diameter of 4 cm, and circle C's circumference is equal to the combined circumferences of circles A and B. What is the ratio of the area of circle C to the total area of circles A and B combined?
- A.
0.51
- B.
1.96
- C.
1.4
- D.
0.714
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 5
Since circumference of C = Circumference of A + circumference of B
GATE Chemical Engineering Mock Test - 7 - Question 6
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Pair the items listed below:
- A.
A – 1, B – 2, C – 3
- B.
A – 3, B – 1, C – 3
- C.
A – 3, B – 3, C – 2
- D.
A – 3, B – 3, C – 1
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 6
Le Blanc Process :
Solvay Process :
Lime Causticization :
GATE Chemical Engineering Mock Test - 7 - Question 7
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Which of the following represents an instance of a Denuding reaction?
- A.
Reaction 1
- B.
Reaction 2
- C.
Reaction 3
- D.
Reaction 1 and 2 both
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 7
Reaction 2 is denuding hence option 2 is correct answer.
GATE Chemical Engineering Mock Test - 7 - Question 8
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Pair the items in the following list:
- A.
A-4 B-3 C-1 D-2
- B.
A-4 B-1 C-3 D-2See AlsoTheir slain will also be cast out, and the stench of their dead bodies will come up; and the mountains will melt in their blood.
- C.
A-2 B-3 C-1 D-4
- D.
A-2 B-1 C-3 D-4
GATE Chemical Engineering Mock Test - 7 - Question 9
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What is the correct chemical formula for 'Raney Nickel'?
- A.
NiSO4
- B.
NaAlO3 + Ni*
- C.
Na2SO4+ Ni*
- D.
AI . Ni
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 9
GATE Chemical Engineering Mock Test - 7 - Question 10
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Spray dryers offer numerous benefits. Which of the following is NOT considered an advantage of a standard spray dryer?
- A.
Has short drying time
- B.
Produces hollow spherical particles
- C.
Has high heat efficiency
- D.
Is suitable for heat sensitive materials
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 10
Spray drying is an unit operation in which high energy consumption take place with relatively low energy utilization.
GATE Chemical Engineering Mock Test - 7 - Question 11
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Which of the following properties of a moving fluid is assessed using a rotameter?
- A.
Static pressure
- B.
Dynamic pressure
- C.
Volumetric flow rate
- D.
Viscosity
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 11
Volumetric flow rate of the liquid is measured by rotameter.
GATE Chemical Engineering Mock Test - 7 - Question 12
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A liquid surge tank features Fin and Fout as the respective inlet and outlet flow rates, as illustrated in the diagram below. The outlet flow rate Fout is directly proportional to the square root of the liquid level h. The tank has a cross-sectional area of 20 cm2. The liquid's density remains constant throughout the system. Under steady state conditions, Fin = Fout = 10 cm3s-1 and h=16 cm. The relationship of h with Fin is modeled as a first order transfer function. What is the CORRECT value of the time constant (in seconds) for this system?
- A.
20
- B.
32
- C.
64
- D.
128
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 12
GATE Chemical Engineering Mock Test - 7 - Question 13
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The Thiele modulus squared, MT, is expressed as
where L denotes the characteristic length of the catalyst pellet, k represents the rate constant for a first-order reaction, and Deff signifies the effective diffusivity of the species within the pores. The term
is an indicator of
- A.
- B.
- C.
- D.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 13
Thiele modulus = reaction rate / diffusion raterate α 1/timeSo, 
GATE Chemical Engineering Mock Test - 7 - Question 14
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A hot-wire anemometer is employed for the determination of
- A.
composition
- B.
flow
- C.
pressure
- D.
temperature
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 14
Hot wire anemometer → flow [velocity]Hence, the correct option is (B).
GATE Chemical Engineering Mock Test - 7 - Question 15
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What is the divergence of the vector field 
?
- A.
- B.
1/3
- C.
1
- D.
3
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 15
Given,
GATE Chemical Engineering Mock Test - 7 - Question 16
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At the point where x = 0, what does the function f(x) = x3 1 possess?
- A.
a maximum value
- B.
a minimum value
- C.
a singularity
- D.
a point of inflection
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 16
f(x) = x³ + 1f'(x) = 3x² = 0 ⇒ x = 0f''(x) = 6xAt x = 0, f''(x) = 0so, f(x)has a point of inflection at x = 0.
GATE Chemical Engineering Mock Test - 7 - Question 17
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Which of the following represents an instance of cationic detergents?
- A.
Pyridinium Derivatives
- B.
Fatty acid anhydrides
- C.
Aliphatic Polyhydric Alcohol esters
- D.
Alkyl-aryl ethylene Oxide derivatives
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 17
Pyridinium derivatives are a type of cationic detergents. These detergents have a positively charged head, making them effective in interacting with negatively charged surfaces such as fabric and certain bacteria.
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 18
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If an amount of Rs. 10,000 is invested at an annual interest rate of 10% compounded quarterly, what will be the value of the investment at the conclusion of 5 years (rounded to 2 decimal places)?
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 18
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 19
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In an isothermal batch reactor, 70% of a liquid reactant is converted within 13 minutes. What is the required space time to achieve this conversion in a plug flow reactor, expressed in minutes?
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 19
For CVRS, time for reaction in ideal batch reactor space time in PFR.
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 20
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A distillation column processing a binary mixture of components A and B is functioning at total reflux with two ideal stages, including the reboiler. The mole fraction of the more volatile component in the residue (xW) is 0.1. The average relative volatility αAB is 4. What is the mole fraction of A in the distillate (xD)? (round off to 2 decimal places)
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 20
At total Reflux Þ Minimum number of platesGiven, xw = 0.1 αAB= 4We know by Fenske Equation
Where Nm = Plates inside column
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 21
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A thick liquid is transported through a network of pipes in a chemical facility. The yearly pumping expense per unit length of the pipe is represented by
The yearly cost of the installed piping system per unit length is expressed as
In this context, D signifies the inner diameter of the pipe in meters, q indicates the volumetric flow rate of the liquid in m3s−1, and μ represents the viscosity of the liquid in Pa.s. If the liquid's viscosity is 20 x10−3 Pa.s and the volumetric flow rate is 10−4 m3s−1, what is the optimal inner diameter of the pipe in _______ meters? (round to 3 decimal places)
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 21
Given
Total annual cost = CPump+CPipingd/dD[Total annual cost ] =0, for economic inner diameter calculation.
Differentiating and equating to zero
Solving by substituting q and MD = 0.0153 m Answer range is 0.014-0.016
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 22
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In a well-stirred batch reactor, reactant A breaks down into products B and C with the aid of an enzyme. The kinetic rate expression is represented as follows: 
Given that the initial concentration of A is 0.02 mol L−1, calculate the time required to reach a 50% conversion of A, rounding your answer to 2 decimal places.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 22
Given
GATE Chemical Engineering Mock Test - 7 - Question 23
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What is the definition of the turnover ratio?
- A.
- B.
- C.
- D.
*Multiple options can be correct
GATE Chemical Engineering Mock Test - 7 - Question 24
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Which of the following assertions are accurate concerning the operations in inorganic chemical manufacturing and fertilizers? (Choose two)
- A.
The contact process is the primary method for producing sulfuric acid and involves the oxidation of sulfur dioxide to sulfur trioxide.
- B.
Ammonium sulfate is produced directly from ammonia and phosphoric acid in the process of making fertilizers.
- C.
The chlor-alkali process primarily produces chlorine and sodium hydroxide through the electrolysis of brine.
- D.
Urea is synthesized from carbon dioxide and ammonia through a direct reaction at low pressure and temperature.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 24
Option A is correct because the contact process indeed involves the oxidation of sulfur dioxide to sulfur trioxide, which is then converted to sulfuric acid.
Option C is correct as the chlor-alkali process does produce chlorine and sodium hydroxide through the electrolysis of brine (saltwater).
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 25
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Water is being pumped at a flow rate of 50cm3/sec through a pipe with a diameter of 0.07 metre at a temperature of 32º C. Given that the permissible pressure drop within the pipe is 8.5 Pa, what is the required length of the pipe? (Provide your answer in metres)Data: Density of water - 1000kg/m3Viscosity of water = 3 CPAt 32º C
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 25
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 26
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A bed with a height of 1.5 metres is composed of catalyst particles that have a diameter of 1.5 mm and a density of 2750 kg/m3. This bed is fluidized using water, which has a density of 1000 kg/m3. At the point of incipient fluidization, the catalyst particles occupy 60% of the bed's volume. What will be the pressure drop across the bed? Assume g = 9.812 m/s2. Please provide your answer in kPa, rounded to three decimal places.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 26
ΔP = (1.5) (9.812) (1750) (0.40) = 10302.6 Pa
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 27
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An adsorbent made from custard apple seeds is utilized to adsorb methylene blue dye from wastewater generated by the textile industry. The initial concentration of the dye is decreased from 0.08 mol/litres to 0.032 mol/litres. Given that 4.8 grams of the adsorbent is applied and the adsorption isotherm is represented by:q = 0.037(C)a where q denotes the dye concentration in the solid (mol/g solid) and C represents the dye concentration in the water (mol/litre) (rounded to two decimal places). Determine the value of ‘a’.
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 27
a = 0.38
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 28
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Water is to be heated from 25º C to 42º C at a flow rate of 550 kg/hour using a double pipe heat exchanger operating in a counter current flow arrangement. The oil flows in at a temperature of 75º C with a mass flow rate of 200 kg/hour.Data : Overall heat transfer coefficient=1800 W/m2.KOutside diameter of the inner pipe = 0.125 mAssume :Heat capacity of water = Heat capacity of oil = 4180 J/kg.KDetermine the length of the heat exchanger inmetres(rounded to the nearest integer)
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 28
LMTD = 12.83º C ; 10856.38 = (1800) (π) (0.125) / x 12.83l = 1.20metre→nearest integer = 1metre
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 29
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In a symmetrical wall with a thickness of 4 metres, uniform heat is produced at the centre (which is 2 metres from each end of the wall) at a rate of 60 watt/m3. The thermal conductivity of the wall is given as 4.40 W/m.K.
What will the value of ΔTmax be in °C?
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 29
ΔTmax= gL2/2K = 27.27°C
*Answer can only contain numeric values
GATE Chemical Engineering Mock Test - 7 - Question 30
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A reversible first-order reaction 
occurs within a batch reactor. Given that CAo = 0.46 mol/lit, CBo = 0, the equilibrium conversion is 58%, and K2 = 0.035 min-1, what is the time (in minutes) required for the conversion of 'A' to reach 38%?
Detailed Solution for GATE Chemical Engineering Mock Test - 7 - Question 30
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