| Post Name | BLENDING ASSISTANT (SKA) (TRAVANCORE SUGARS AND CHEMICALS LTD) |
|---|---|
| Question Paper Code | 139/2024 |
| Category Code | 063/2023 |
| Date of Test | 17 October 2024 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which of the following represents the simplest whole number ratio of various atoms
present in a compound?
Answer
A. Empirical formula
2
Identify the correct coefficients for: a C₇H₁₆(l) + b O₂(g) → c CO₂(g) + d H₂O(g).
Answer
D. a = 1, b = 11, c = 7, d = 8
3
The material balance equation for a continuous processes at steady-state is :
Answer
B. input + generation = output + consumption
4
10 moles of A were present in a system initially and 12 moles of B are added to it. If it
undergoes the reaction 2A + 3B → 2C , what are number of moles of C produced?
Answer
A. 8
5
Which of the following is not produced during the complete combustion of a fuel?
Answer
D. CO
6
100 moles of SO2 and 100 moles O2 are fed to a reactor and they react according to
2SO2 + O2 → 2SO3 . Find the limiting reactant :
Answer
B. SO2
7
According to the drinking water quality specifications (IS : 10500), the desirable pH limit
is :
Answer
A. 6.5 to 8.5
8
Given below are a few statements about water. Identify the wrong statement /
statements.
(i) Pure water is tasteless, colourless and odourless.
(ii) Hard water does not produce easy and ready lather with soap.
(iii) Hardness level between 60 to 100 ppm is recommended for drinking water.
(iv) Temporary hardness can be removed only by boiling of water.
(v) Permanent hardness cannot be removed by boiling.
Answer
B. (iii) and (iv)
9
Identify the chemical compound indicated by the following statements :
(i) It is found to be the most insoluble salt that can be precipitated during water
treatment.
(ii) It can be used as a primary standard.
(iii) It is chosen as the standard for expressing hardness of water.
(iv) Equivalent weight of it is 50
Answer
B. CaCO3
10
The amount of oxygen required for the complete oxidation of biologically active and
biologically inert materials present in one litre sewage water using chemical oxidising
agents such as potassium dichromate is called :
Answer
C. Chemical Oxygen Demand
11
An instrument developed for measuring low turbidities in water :
Answer
A. Nephelometer
12
An instrument that measures the amount of light absorbed by a sample :
Answer
C. Spectrophotometer
13
Glycerol can be separated from spent-lye in soap industry by using :
Answer
B. Distillation under reduced pressure
14
Identify 3, 3-Dimethylpentane :
(i)
Answer
D. (i), (ii) and (iii)
15
Which of the following is not an aromatic compound?
Answer
C. Butene
16
The concept of microbial fermentation is developed by :
Answer
B. Louis Pasteur
17
What is the role of bacterial pili?
Answer
D. Adhesion to surfaces
18
Light source preferred for Lovibond comparator to ensure accurate color reading is :
Answer
C. Tungsten lamp
19
–————— is the selective medium used for the isolation of pseudomonas aeruginosa.
Answer
A. Cetrimide Agar
20
–————— is the method used to detect specific RNA sequences in a sample.
Answer
A. Northern Blot
21
The enzyme used in PCR technique is :
Answer
C. Taq polymerase
22
Which one of the following is a gram negative anaerobic bacterium?
Answer
D. Porphyromonas gingivalis
23
–————— is an enrichment medium.
Answer
B. Tetrathionate broth
24
During ethanol production, which microorganism is primarily used for fermentation :
Answer
C. Saccharomyces cerevisiae
25
Name the nutrient rich medium extracted from malted barley after mashing and before
boiling :
Answer
A. Wort
26
Which raw material used for ethyl alcohol production?
Answer
C. Molasses
27
What is the molecular weight of Ethyl alcohol?
Answer
A. 46
28
What is the use of Bagasse?
Answer
A. As a fuel
29
Which of the following separation technique is used in the sugar manufacturing process?
Answer
B. Crystallisation
30
What is the temperature of fermentator during production of ethyl alcohol from
molasses?
Answer
C. 20 – 30 °C
31
Which is the by product of sugar manufacturing process?
Answer
A. Molasses
32
What is the role of sulphur dioxide in sugar manufacturing process?
Answer
B. Bleaching agent
33
Which mixer mix solids by repeatedly lifting and dropping the material and rolling it?
Answer
C. Tumbling mixer
34
Which of the following is very effective impellers over a wide range of viscosities?
Answer
B. Turbines
35
Generally, what is the relation between turbine diameter and tank diameter in
mechanically agitated vessel for gas liquid system?
Answer
A. Diameter of turbine is one - third of the tank diameter
36
Which of the following is statement is correct?
Answer
C. A propeller is axial flow, high speed impeller
37
Which equipment mix solids by mechanical shuffling?
Answer
C. Ribbon blender
38
What is the full form of NIOSH in safety?
Answer
C. National institute of occupational safety and health
39
Which of the following statement is correct?
Answer
D. The fire point temperature is higher than the flash point
40
In which classification of fire involves solid combustible materials like paper and wood?
Answer
A. Class A fire
41
What is the best way of avoiding accident?
Answer
B. Observing safety rules related to job and workplace
42
In house keeping which of the following denotes the cleanness in concept of 5S?
Answer
C. Shine
43
According to the fire triangle what is the combination of fire?
Answer
A. Fuel, Oxygen and heat
44
Which of the following is an unsafe act that causes accident?
Answer
C. Failure to wear personal protective equipments
45
In fluids, which of the statement is incorrect?
Answer
A. A fluid is a substance that has a definite shape
46
If the density of a fluid is affected appreciably by changes in temperature and pressure,
the fluid is said to be :
Answer
B. Compressible fluid
47
Density is defined as :
Answer
D. Mass of the fluid per unit volume
48
Which of the following is a variable area meter?
Answer
C. Rotameter
49
In Venturi meter, which of the following is used to measure the pressure difference?
Answer
B. U-tube manometer
50
Which device is used to measure the point velocity by measuring the difference between
impact pressure and static pressure?
Answer
D. Pitot tube
A 9 139/2024
51
Which of the following statement is/are correct about cathode rays?
(i) They starts from cathode and move towards anode
(ii) They consists of positivity charged particles
(iii) They travel in straight line in the absence of electric or magnetic field
(iv) They travels from anode to cathode.
Choose the correct answer from the codes given below
Answer
B. Only (i) and (iii)
52
What is the electronic configuration of chromium
Answer
B. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s1 3 d 5
53
What will be the wavelength of a ball of mass 0.1 kilogram moving with a velocity of
100 m/s?
Answer
D. None of the above
54
Identify the incorrect statement about azimuthal quantum number :
Answer
C. It gives information about the spatial orientation of the orbital
55
Which of the following type of orbital is spherical shape?
Answer
A. s -orbital
56
Find out correct statement with respect to bond order :
(i) Bond order is used to predict the stability of molecule
(ii) If bond order is 2, it indicates presence of double bond
(iii) Bond order is directly proportional to bond length
(iv) Bond order can be an integer or a fraction
Choose the correct answer from the codes given below :
Answer
C. Only (i), (ii) and (iv)
57
Which of the following molecule are excepted from octet rule?
Answer
A. BCl 3 , SF6 , NO
58
Which of the following molecule has a bent shape according to VSEPR theory?
Answer
C. H2O
59
What is the main requirement for a molecule to form hydrogen bonds?
Answer
D. Presence of hydrogen atoms bonded to highly electronegative atoms
60
Which of the following molecules not undergoes SP3 hybridization?
Answer
A. BF3
61
For the process to occur under adiabatic conditions, the correct condition is :
Answer
C. q=0
62
Which of the following statement is/are correct about spontaneity?
(i) ΔG determines the spontaneity of reaction
(ii) Spontaneous process always decrease entropy
(iii) Spontaneity is independent of temperature
(iv) Spontaneous process always increases entropy
Choose the correct answer from the codes given below :
Answer
A. Only (i) and (iv)
63
C2 H5OH(l ) + 3O2 (g ) → 2CO2 (g ) + 3H2O(l ) ΔH = −1367 KJ/mol
The above thermochemical reaction indicates.
Answer
B. Exothermic reaction
64
Which among the following is/are intensive properties?
(i) Mass
(ii) Temperature
(iii) Enthalpy
(iv) Density
Choose the correct answer from the codes given below :
Answer
C. Only (ii) and (iv)
65
What is the pH of a solution with a hydrogen ion concentration [H + ] of 0.001 M solution
of HCl?
Answer
B. 3
66
What is the effect of increasing the concentration of a reactant on an equilibrium
system?
Answer
C. The equilibrium will shift to the right
67
Which of the following statement is/are incorrect about equilibrium constant (K) :
(i) It predicts the extent of reaction
(ii) The value of K independent of initial concentrations of reactance and products
(iii) K is the sum of reactant and product concentrations
(iv) K is independent of temperature
Choose the correct answer
Answer
B. Only (iii) and (iv)
68
Which of the following is an example of a Lewis base?
Answer
D. All of the above
69
In which field, Van’t Hoff was awarded the first Nobel prize in Chemistry?
(i) Organic chemistry
(ii) Vital force theory
(iii) Stereo chemistry
(iv) Theory of relativity
Answer
B. (i), (iii)
70
Represent the shape of HCN molecule from the geometry given below :
Answer
A. Linear
71
Select from the following, the highest electronegative organic compound :
Answer
C. Acetylene
72
Give the IUPAC name for the given structure of organic compound :
CH3 − CH − CH − CH3
| |
Cl COOH
Answer
Question Cancelled
73
Identify the compound which is not a functional isomer for the molecular formula
C3H6O?
Answer
D. Methoxy methane
74
Which is the most reliable test to detect Nitrogen, Sulphur and Halogen in an organic
compound?
Answer
D. Lassaigne’s test
75
Select the convenient method to prepare symmetric Alkanes from the reactions given
below :
(i) Decarboxylation
(ii) Wurtz reaction
(iii) Kolbe’s electrolytic method
(iv) Hydrogenation of Akenes
Answer
B. (ii), (iii)
76
n – Butane melts at 138 K but n – Propane melts at 85.3 K. Propane have low melting
point. Identify the correct reason behind it?
Answer
Question Cancelled
77
Name the reagent used to distinguish Ethylene from Ethane :
Answer
Question Cancelled
78
CH₃−CH₂−CH(I)−CH₃ + KOH (alcohol) → CH₃−CH=CH−CH₃. Select the name of the reaction: (i) Markovnikov's rule; (ii) Zaitsev's rule; (iii) β-elimination; (iv) dehydrogenation.
Answer
C. (ii), (iii)
79
Certain terms like mole fraction, molality is preferred to express the concentration of
solution. Which factor helps to identify it?
Answer
A. Mass
80
Plants absorb water from the soil through their roots. Where this process is applied?
Answer
C. Osmosis
81
In the association of Benzoic acid in Benzene, which value of Van’t Hoff factor given
below is appropriate for it?
Answer
C. 0.5
82
From the factors given relating to osmotic pressure of a solution, select the false
statement :
Answer
D. directly proportional to molar mass of solute
83
For the reaction H₂ + Cl₂ → 2HCl, Rate = K. What is the order of this reaction?
Answer
C. Zero order
84
Value of rate constant in a reaction does not depend on :
Answer
C. Concentration
85
Rate of reaction = K[NO]²[Br₂]. When the concentration of Br₂ is halved, what will be the change in rate?
Answer
A. halved
86
On increasing the temperature by 10 K, the rate of reaction doubles. Justify :
Answer
Question Cancelled
87
Which reagent is used for the conversion of Sodium phenoxide to Salicylic acid?
Answer
D. CO2 /HCl
88
Carbolic acid is :
Answer
A. An aqueous solution of phenol
89
The IUPAC name of Anisole is :
Answer
B. Methoxy benzene
90
Which is the best reagent for the halogenation of alcohols?
Answer
D. SOCl 2
91
Rectified spirit is :
Answer
B. 95% ethanol and 5% water
92
Rank the following carboxylic acids according to their relative acidities :
Answer
A. III > II > I
93
Formaldehyde when treated with KOH gives methanol and potassium formate what is
the name of this reaction?
Answer
B. Cannizaro reaction
94
Which of the following compounds will show positive silver mirror test?
CH3CH2C − CH3
||
Answer
A. CH3CH2CH2CHO
95
Grignard reagent is treated with formaldehyde followed by hydrolysis to form :
Answer
D. Primary alcohol
96
Which of the following statements about the anomeric carbon in carbohydrate is true?
Answer
B. In α-
97
Which of the following statements about protein structure is true?
Answer
B. The Secondary structure of a protein is stabilized by hydrogen bonds between
the backbone amide and carbonyl groups
98
Which of the following statements accurately describes enzyme specificity and its
relation to the enzyme-substrate complex ?
Answer
Question Cancelled
99
Which of the following statements about the DNA double helix structure is not correct?
Answer
D. The DNA double helix has a uniform diameter due to the pairing of purines
with purines and pyrimidines with pyrimidines
100
Which of the following statements about Vitamin D is true?
Answer
B. Vitamin D deficiency can lead to bone disorders such as rickets in children
and osteomalacia in adults
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