CHEMISTRY- PAGE 2
1. Consider the following statements :
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
1. to keep the washing powder dry.
2. to maintain the alkalinity of the powder.
Which of these statements is / are correct ?
(a). Only 1
(b). Only 2
(c). Both 1 and 2
(d). Neither 1 nor 2
Answer: Both 1 and 2
2. An example of Lewis acid is:
(a). NH3
(b) BF3
(c) CH3OH
(d) H2O2
Answer: BF3
3. Which one of the following statements is NOT correct ?
(a). The presence of NaCl increases the rate of setting of Plaster of Paris
(b). Gypsum is added to the cement to slow down its rate of setting
(c). All alkaline earth metals form hydrated salts
(d). Barium and Strontium are found free in nature
Answer: Barium and Strontium are found free in nature
4. Assertion (a). : In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.
Reason (R) : In a group, the atomic radii generally increase from top to bottom.
You are to examine these two statements carefully and select the answers to these items using the codes given below :
Codes :
(a). Both A and R are individually true and R is the correct explanation of A
(b). Both A and R are individually true but R is not the correct explanation of A
(c). A is true but R is false
(d). A is false but R is true
Answer: (d)
5. Assertion (a). : Coal-based thermal power stations contribute to acid-rain.
Reason (R) : Oxides of carbon are emitted when coal burns.
You are to examine these two statements carefully and select the answers to these items using the codes given below :
Codes :
(a). Both A and R are individually true and R is the correct explanation of A
(b). Both A and R are individually true but R is not the correct explanation of A
(c). A is true but R is false
(d). A is false but R is true
Answer: (b)
6. Paracetamol is an
(a). Antiseptic
(b). Antipyretic
(c). Antacid
(d). Antibiotics
Answer: Option-B
7. What is power alcohol?
(a). 100% ethanol
(b). 8-10% ethanol
(c). 95.6% ethanol
(d). Ethanol+petrol
Answer: Option-D
8. Contact Process is the industrial method of preparation of
(a). Ammonia
(b). Sulphuric acid
(c). Nitric acid
(d). Hydrochloric acid
Answer: Option-B
9. Brown ring test is used for the detection of
(a). Sulphate
(b). Chloride
(c). Nitrate
(d). Acetate
Answer: Option-C
10. Which of the following is an ore of iron?
(a). Bauxite
(b). Haematite
(c). Magnesite
(d). Carnalite
Answer: Option-B
11. 1 mole ammonia contains
(a). 1 molecule ammonia
(b). 3×6.022×10²³ molecules of ammonia
(c). 6.022×10²³ molecules of ammonia
(d). 6.022×10²³⁄ 3 molecules of ammonia
Answer: Option-C
12. M shell has .......... subshells
(a). 3
(b). 1
(c). 2
(d). 4
Answer: Option-A
13. The atomic number of Ne is10. How many electrons are present in it?
(a). 5
(b). 6
(c). 11
(d). 10
Answer: Option-D
14. Which is the main component of CNG
(a). Ethane
(b). Methane
(c). Butane
(d). Propane
Answer: Option-B
15. Which is the chief component of L.P.G?
(a). Methane
(b). Ethane
(c). Propane
(d). Butane
Answer: Option-D
16. Carbon Monoxide combines with Hemoglobin and forms
(a). Oxyhemoglobin
(b). Carbamino haemoglobin
(c). Carboxy hemoglobin
(d). Carbonic acid
Answer: Option-C
17. Which one of the following statements is correct ?
(a). Liquid Sodium is employed as a coolant in nuclear reactors
(b). Calcium carbonate is an ingredient of tooth paste
(c). Bordeaux mixture consists of Sodium sulphate and lime
(d). Zinc amalgams are used as a dental filling
Answer: (a)
18. KMnO4 reacts with HCl to yield
(a). Chlorine
(b). Hydrogen
(c). KClO3
(d). Oxygen
Answer: Chlorine
19. By which one of the following processes silver is extracted?
(a). Cyanide process
(b). Amalgamation
(c). Thermite process
(d). Carbon reduction process
Answer: Cyanide process
20. The amalgam used for dental filling is
(a). Silver tin amalgam
(b). Gold amalgam
(c). Iron amalgam
(d). Sodium amalgam
Answer: Silver tin amalgam
21. Amalgams are
(a). Highly colored alloys
(b). Always solids
(c). Alloys which contain mercury as one of the elements
(d). Alloys which have great resistance to abrasion
Answer: Alloys which contain mercury as one of the elements
22. Which is NOT a thermosetting plastic?
(a). Bakelite
(b). PVC
(c).Melamine
(d).Epoxy resins
Answer: PVC
23. The composition of Gypsum is:
(a). CaS04.2H20
(b) PbS04
(c).BaS04
(d).MgS04 7H20
Answer: CaS04.2H20
24. The chemical responsible for the smell of garlic is:
(a). Allyl mercaptan
(b).Benzoic acid
(c).Allyl isothiocyanatc
(d).Benzaldehyde
Answer: Allyl mercaptan
25. The General electronic configuration of Carbon group elements is:
(a) ns2np6
(b).ns2
(c).ns2np1
(d). ns2np2
Answer: ns2np2
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
1. to keep the washing powder dry.
2. to maintain the alkalinity of the powder.
Which of these statements is / are correct ?
(a). Only 1
(b). Only 2
(c). Both 1 and 2
(d). Neither 1 nor 2
Answer: Both 1 and 2
2. An example of Lewis acid is:
(a). NH3
(b) BF3
(c) CH3OH
(d) H2O2
Answer: BF3
3. Which one of the following statements is NOT correct ?
(a). The presence of NaCl increases the rate of setting of Plaster of Paris
(b). Gypsum is added to the cement to slow down its rate of setting
(c). All alkaline earth metals form hydrated salts
(d). Barium and Strontium are found free in nature
Answer: Barium and Strontium are found free in nature
4. Assertion (a). : In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.
Reason (R) : In a group, the atomic radii generally increase from top to bottom.
You are to examine these two statements carefully and select the answers to these items using the codes given below :
Codes :
(a). Both A and R are individually true and R is the correct explanation of A
(b). Both A and R are individually true but R is not the correct explanation of A
(c). A is true but R is false
(d). A is false but R is true
Answer: (d)
5. Assertion (a). : Coal-based thermal power stations contribute to acid-rain.
Reason (R) : Oxides of carbon are emitted when coal burns.
You are to examine these two statements carefully and select the answers to these items using the codes given below :
Codes :
(a). Both A and R are individually true and R is the correct explanation of A
(b). Both A and R are individually true but R is not the correct explanation of A
(c). A is true but R is false
(d). A is false but R is true
Answer: (b)
6. Paracetamol is an
(a). Antiseptic
(b). Antipyretic
(c). Antacid
(d). Antibiotics
Answer: Option-B
7. What is power alcohol?
(a). 100% ethanol
(b). 8-10% ethanol
(c). 95.6% ethanol
(d). Ethanol+petrol
Answer: Option-D
8. Contact Process is the industrial method of preparation of
(a). Ammonia
(b). Sulphuric acid
(c). Nitric acid
(d). Hydrochloric acid
Answer: Option-B
9. Brown ring test is used for the detection of
(a). Sulphate
(b). Chloride
(c). Nitrate
(d). Acetate
Answer: Option-C
10. Which of the following is an ore of iron?
(a). Bauxite
(b). Haematite
(c). Magnesite
(d). Carnalite
Answer: Option-B
11. 1 mole ammonia contains
(a). 1 molecule ammonia
(b). 3×6.022×10²³ molecules of ammonia
(c). 6.022×10²³ molecules of ammonia
(d). 6.022×10²³⁄ 3 molecules of ammonia
Answer: Option-C
12. M shell has .......... subshells
(a). 3
(b). 1
(c). 2
(d). 4
Answer: Option-A
13. The atomic number of Ne is10. How many electrons are present in it?
(a). 5
(b). 6
(c). 11
(d). 10
Answer: Option-D
14. Which is the main component of CNG
(a). Ethane
(b). Methane
(c). Butane
(d). Propane
Answer: Option-B
15. Which is the chief component of L.P.G?
(a). Methane
(b). Ethane
(c). Propane
(d). Butane
Answer: Option-D
16. Carbon Monoxide combines with Hemoglobin and forms
(a). Oxyhemoglobin
(b). Carbamino haemoglobin
(c). Carboxy hemoglobin
(d). Carbonic acid
Answer: Option-C
17. Which one of the following statements is correct ?
(a). Liquid Sodium is employed as a coolant in nuclear reactors
(b). Calcium carbonate is an ingredient of tooth paste
(c). Bordeaux mixture consists of Sodium sulphate and lime
(d). Zinc amalgams are used as a dental filling
Answer: (a)
18. KMnO4 reacts with HCl to yield
(a). Chlorine
(b). Hydrogen
(c). KClO3
(d). Oxygen
Answer: Chlorine
19. By which one of the following processes silver is extracted?
(a). Cyanide process
(b). Amalgamation
(c). Thermite process
(d). Carbon reduction process
Answer: Cyanide process
20. The amalgam used for dental filling is
(a). Silver tin amalgam
(b). Gold amalgam
(c). Iron amalgam
(d). Sodium amalgam
Answer: Silver tin amalgam
21. Amalgams are
(a). Highly colored alloys
(b). Always solids
(c). Alloys which contain mercury as one of the elements
(d). Alloys which have great resistance to abrasion
Answer: Alloys which contain mercury as one of the elements
22. Which is NOT a thermosetting plastic?
(a). Bakelite
(b). PVC
(c).Melamine
(d).Epoxy resins
Answer: PVC
23. The composition of Gypsum is:
(a). CaS04.2H20
(b) PbS04
(c).BaS04
(d).MgS04 7H20
Answer: CaS04.2H20
24. The chemical responsible for the smell of garlic is:
(a). Allyl mercaptan
(b).Benzoic acid
(c).Allyl isothiocyanatc
(d).Benzaldehyde
Answer: Allyl mercaptan
25. The General electronic configuration of Carbon group elements is:
(a) ns2np6
(b).ns2
(c).ns2np1
(d). ns2np2
Answer: ns2np2
26:-The law of constancy of interfacial angle is called :
A:-Hauy's law
B:-Law of symmetry
C:-Steno's law
D:-Miller's law
Ans: C
27:-The solubility of gas increases in a liquid with
(A) Decrease in temperature (B) Increase in temperature
(C) Reduction of gas pressure (D) Amount of liquid taken
Ans: A
28:-A plot of log[A] Vs time(t) gives a straight line with negative slope. The order of the reaction is :
A:-0
B:-1
C:-2
D:-3
Ans: B
29:-The nature of electronic spectra of 'd' block elements is mainly due to :
A:-Incomplete d-orbitals
B:-Term splitting in different crystal field geometry
C:-Presence of hydrated ions
D:-Removal of degeneracy of d-orbitals
Ans: A
30:-How many Bravais lattices can exist in nature ?
A:-32
B:-17
C:-14
D:-7
Ans: C
31:-How many ESR lines are observed if an unpaired electron when closed to two non-equivalent protons is placed in magnetic field ?
A:-2
B:-4
C:-6
D:-8
Ans: B
32:-For which one of the following process is inter system crossing (ISC) essential ?
A:-Fluorescence
B:-Radioactive decay
C:-Chemiluminescence
D:-Phosphorescence
Ans: D
33:-The molecules of `H_2O` belongs to the point group :
A:-`D_4`
B:-`C_3V`
C:-`C_2V`
D:-`C_3`
Ans: C
34:-Alums purify muddy water by _______ .
(A) Coagulation (B) Forming a true solution (C) Dialysis (D) Adsorption
Ans: A
35:-What is the effect of hydrogen bonding on the IR absorption of N-H group ?
A:-It shifts to lower wave number
B:-It shifts to higher wave number
C:-No change is observed
D:-None of these
Ans: A
36:-A symmetry element which distinguishes maleic acid from fumaric acid is :
A:-`C_2`
B:-I
C:-`S_4`
D:-None of the above
Ans: A
37:-How many hyperfine lines in ESR spectrum are shown by `Mn^2+` ?
A:-6
B:-5
C:-4
D:-3
Ans: A
38:-A is the stereoisomer of the compound B, Therefore A and B differ in their :
A:-Composition
B:-Steric Hindrance
C:-Configuration
D:-Constitution
Ans: C
39:-The hybridization of the central carbon in allenes is :
A:-`dsp^(2)`
B:-`sp^(3)`
C:-`sp^(2)`
D:-sp
Ans: D
40:-High quantum yields of photochemical reactions are due to :
A:-Lowering of activation energy
B:-Accompanying side reactions
C:-Formation of free radicals
D:-High frequency of collision
Ans: B
41:-Ozone layer is present in
(A) Troposphere (B) Stratosphere (C) Exosphere (D) Mesosphere
Ans: B
42:-Hess’s law is applicable to
(A) Changes in heat of reaction (B) The influence of pressure on reaction rate (C) Rate of reaction (D) Equilibrium constant
Ans: A
43:-Predict the number of translational, rotational and vibrational degrees of freedom in neon :
A:-3, 0, 1
B:-3, 1, 0
C:-3, 0, 0
D:-3, 1, 1
Ans: C
44:-How many diastereomers are shown by the molecules `CH_3CH=CHCH=CH-C_2H_5?`
A:-1
B:-4
C:-3
D:-2
Ans: B
45:-The term 'quantum mechanics' was first introduced by :
A:-Schrondinger
B:-Max Born
C:-Bohr
D:-Einstein
Ans: B
46:-Which of the following radiation has the longest wavelength ?
A:-UV
B:-Micro wave
C:-Cosmic wave
D:-Radio wave
Ans: D
47:-Transmittance in spectroscopy analysis is a function primarily of the :
A:-Optical path
B:-Monochromator
C:-Velocity of light
D:-Barometric pressure
Ans: C
48:-Which of the following properties of transition metal complexes can be explained on the basis of crystal field theory ?
A:-Colour
B:-Magnetic moment
C:-Dipole moment
D:-Both (1) and (2)
Ans: D
49:- What is the significant number of the value 0.000102?
(A) 3
(B) 7
(C) 2
(D) 6
Ans: A
50:-The number of vibrational degrees of freedom in toluene is :
A:-39
B:-40
C:-9
D:-24
Ans: A
51:-Decomposition of KCIO`_3` in the presence of MnO`_2` is an example of :
A:-Homogeneous catalysts involving solid reactants
B:-Heterogeneous catalysts involving solid reactants
C:-Homogeneous catalysts involving liquid reactants
D:-Heterogeneous catalysts involving liquid reactants
Ans: B
52:-Name the effect which says that the wavelength of an X-ray increases when it is scattered by an atomic electron.
A:-Zeeman
B:-Compton
C:-Jahn Teller
D:-Stark
Ans: B
53:-The chromatographic process in which the separation of the sample components takes place according to molecular size are called :
A:-Adsorption chromatography
B:-Partition chromatography
C:-Exclusion chromatography
D:-Ion exchange chromatography
Ans: C
A:-Hauy's law
B:-Law of symmetry
C:-Steno's law
D:-Miller's law
Ans: C
27:-The solubility of gas increases in a liquid with
(A) Decrease in temperature (B) Increase in temperature
(C) Reduction of gas pressure (D) Amount of liquid taken
Ans: A
28:-A plot of log[A] Vs time(t) gives a straight line with negative slope. The order of the reaction is :
A:-0
B:-1
C:-2
D:-3
Ans: B
29:-The nature of electronic spectra of 'd' block elements is mainly due to :
A:-Incomplete d-orbitals
B:-Term splitting in different crystal field geometry
C:-Presence of hydrated ions
D:-Removal of degeneracy of d-orbitals
Ans: A
30:-How many Bravais lattices can exist in nature ?
A:-32
B:-17
C:-14
D:-7
Ans: C
31:-How many ESR lines are observed if an unpaired electron when closed to two non-equivalent protons is placed in magnetic field ?
A:-2
B:-4
C:-6
D:-8
Ans: B
32:-For which one of the following process is inter system crossing (ISC) essential ?
A:-Fluorescence
B:-Radioactive decay
C:-Chemiluminescence
D:-Phosphorescence
Ans: D
33:-The molecules of `H_2O` belongs to the point group :
A:-`D_4`
B:-`C_3V`
C:-`C_2V`
D:-`C_3`
Ans: C
34:-Alums purify muddy water by _______ .
(A) Coagulation (B) Forming a true solution (C) Dialysis (D) Adsorption
Ans: A
35:-What is the effect of hydrogen bonding on the IR absorption of N-H group ?
A:-It shifts to lower wave number
B:-It shifts to higher wave number
C:-No change is observed
D:-None of these
Ans: A
36:-A symmetry element which distinguishes maleic acid from fumaric acid is :
A:-`C_2`
B:-I
C:-`S_4`
D:-None of the above
Ans: A
37:-How many hyperfine lines in ESR spectrum are shown by `Mn^2+` ?
A:-6
B:-5
C:-4
D:-3
Ans: A
38:-A is the stereoisomer of the compound B, Therefore A and B differ in their :
A:-Composition
B:-Steric Hindrance
C:-Configuration
D:-Constitution
Ans: C
39:-The hybridization of the central carbon in allenes is :
A:-`dsp^(2)`
B:-`sp^(3)`
C:-`sp^(2)`
D:-sp
Ans: D
40:-High quantum yields of photochemical reactions are due to :
A:-Lowering of activation energy
B:-Accompanying side reactions
C:-Formation of free radicals
D:-High frequency of collision
Ans: B
41:-Ozone layer is present in
(A) Troposphere (B) Stratosphere (C) Exosphere (D) Mesosphere
Ans: B
42:-Hess’s law is applicable to
(A) Changes in heat of reaction (B) The influence of pressure on reaction rate (C) Rate of reaction (D) Equilibrium constant
Ans: A
43:-Predict the number of translational, rotational and vibrational degrees of freedom in neon :
A:-3, 0, 1
B:-3, 1, 0
C:-3, 0, 0
D:-3, 1, 1
Ans: C
44:-How many diastereomers are shown by the molecules `CH_3CH=CHCH=CH-C_2H_5?`
A:-1
B:-4
C:-3
D:-2
Ans: B
45:-The term 'quantum mechanics' was first introduced by :
A:-Schrondinger
B:-Max Born
C:-Bohr
D:-Einstein
Ans: B
46:-Which of the following radiation has the longest wavelength ?
A:-UV
B:-Micro wave
C:-Cosmic wave
D:-Radio wave
Ans: D
47:-Transmittance in spectroscopy analysis is a function primarily of the :
A:-Optical path
B:-Monochromator
C:-Velocity of light
D:-Barometric pressure
Ans: C
48:-Which of the following properties of transition metal complexes can be explained on the basis of crystal field theory ?
A:-Colour
B:-Magnetic moment
C:-Dipole moment
D:-Both (1) and (2)
Ans: D
49:- What is the significant number of the value 0.000102?
(A) 3
(B) 7
(C) 2
(D) 6
Ans: A
50:-The number of vibrational degrees of freedom in toluene is :
A:-39
B:-40
C:-9
D:-24
Ans: A
51:-Decomposition of KCIO`_3` in the presence of MnO`_2` is an example of :
A:-Homogeneous catalysts involving solid reactants
B:-Heterogeneous catalysts involving solid reactants
C:-Homogeneous catalysts involving liquid reactants
D:-Heterogeneous catalysts involving liquid reactants
Ans: B
52:-Name the effect which says that the wavelength of an X-ray increases when it is scattered by an atomic electron.
A:-Zeeman
B:-Compton
C:-Jahn Teller
D:-Stark
Ans: B
53:-The chromatographic process in which the separation of the sample components takes place according to molecular size are called :
A:-Adsorption chromatography
B:-Partition chromatography
C:-Exclusion chromatography
D:-Ion exchange chromatography
Ans: C
54:-The plane of symmetry perpendicular to the principal axis of rotation in `BF_(3)` is :
A:-0
B:-1
C:-2
D:-3
Ans: B
55:-Who was the first scientist to make an attempt at deriving an equation for distribution of radiation density in terms of the classical laws of mechanics ?
A:-Lord Rayleigh
B:-Boltzmann
C:-Max Plank
D:-Einstein
Ans: A
56 A:-Stereoisomers
B:-Enantiomers
C:-Diastereomers
D:-Atropisomers
Ans: D
57:-The miller indices are often used in the area of :
A:-Single crystal
B:-Polymer
C:-Solution
D:-Surface Chemistry
Ans: A
A:-0
B:-1
C:-2
D:-3
Ans: B
55:-Who was the first scientist to make an attempt at deriving an equation for distribution of radiation density in terms of the classical laws of mechanics ?
A:-Lord Rayleigh
B:-Boltzmann
C:-Max Plank
D:-Einstein
Ans: A
56 A:-Stereoisomers
B:-Enantiomers
C:-Diastereomers
D:-Atropisomers
Ans: D
57:-The miller indices are often used in the area of :
A:-Single crystal
B:-Polymer
C:-Solution
D:-Surface Chemistry
Ans: A
58:-Invar is an alloy of
A:-Copper and Nickel
B:-Tin and Lead
C:-Iron and Nickel
D:-Copper and Tin
Ans: C
59:-The chemical name of Bleaching Powder
A:-Calcium Hypochlorite
B:-Calcium Sulphate
C:-Silicon Dioxide
D:-Zinc Oxide
Ans: A
60:-Gas used for Welding purpose
A:-Oxygen
B:-Acetylane
C:-Hydrogen
D:-Methane
Ans: B
61:-The atomic number of Gold
A:-56
B:-89
C:-79
D:-73
Ans: C
62:-Age of a fluorescent lamp is
A:-4000 hours
B:-5000 hours
C:-6000 hours
D:-7000 hours
Ans: B
A:-Copper and Nickel
B:-Tin and Lead
C:-Iron and Nickel
D:-Copper and Tin
Ans: C
59:-The chemical name of Bleaching Powder
A:-Calcium Hypochlorite
B:-Calcium Sulphate
C:-Silicon Dioxide
D:-Zinc Oxide
Ans: A
60:-Gas used for Welding purpose
A:-Oxygen
B:-Acetylane
C:-Hydrogen
D:-Methane
Ans: B
61:-The atomic number of Gold
A:-56
B:-89
C:-79
D:-73
Ans: C
62:-Age of a fluorescent lamp is
A:-4000 hours
B:-5000 hours
C:-6000 hours
D:-7000 hours
Ans: B
63. Crude petroleum consists of
1) 84-87 % carbon & 11-14 % hydrogen
2) 11-14 % carbon & 84-87 % hydrogen
3) 54 % carbon & 25 % hydrogen
4) 70- 72 % carbon & 5-7 % hydrogen
Ans: 1
64. Mercaptans are added to liquefied petroleum gas to
1) reduce its cost
2) assist in checking its leakage
3) increase its calorific value
4) reduce explosion limit
Ans: 2
65. Hydrolysis of sugar is called
1) hydration
2) inversion
3) esterification
4) none of these
Ans: 2
66. Sodium tripoly phosphate (stpp) is used as
1) a reinforcing agent in elastomers
2) a raw material in the production of food - grade phosphoric acid.
3) a builder in detergents.
4) all of these
Ans: 3
67. Turbidity of water is an indication of the presence of
1) dissolved solids
2) dissolved gases
3) floating solids
4) suspended inorganic matter
Ans: 4
68. Most efficient suitable dust removal equipment for removal of fly ash from flue gas in a thermal power plant is
1) electrostatic precipitator
2) bag filter
3) gravity settling chamber
4) cyclone separator
Ans: 1
69. Cyclone separator's working is based mainly on
1) diffusion
2) gravitation
3) centrifugal force
4) electrostatic force
Ans: 3
70. In the design of grit chambers
1) temperature is an important factor
2) the maximum velocity of flow is 1 ft/s
3) the detention period should be atleast 30 min
4) there should be a 5 to 1 ratio of length to depth.
Ans: 2
71. Chloramines are used in water treatment
1) for disinfection
2) for taste and colour control
3) as algicides
4) for weed control in reservoirs
Ans: 1
72. Ecological system or ecosystem refers to
1) a group of individuals of any one kind of organism
2) all of the population occupying a given area
3) the community and non- living environment working together
4) a portion of the earth where living objects can be found .
Ans: 3
73. For protection of acquatic life in a fresh water stream sewage effluent should never lower the dissolved oxygen content lower than
1) 15 ppm
2) 10 ppm
3) 5 ppm
4) 20 ppm
Ans: 3
74. Spetice tank are primarily used for
1) the aerobic decomposition of deposited sweage solids
2) separation of deposited solids
3) anaerobic decomposition of depsited solids
4) separation of oil & grease scums.
Ans: 1
1) 84-87 % carbon & 11-14 % hydrogen
2) 11-14 % carbon & 84-87 % hydrogen
3) 54 % carbon & 25 % hydrogen
4) 70- 72 % carbon & 5-7 % hydrogen
Ans: 1
64. Mercaptans are added to liquefied petroleum gas to
1) reduce its cost
2) assist in checking its leakage
3) increase its calorific value
4) reduce explosion limit
Ans: 2
65. Hydrolysis of sugar is called
1) hydration
2) inversion
3) esterification
4) none of these
Ans: 2
66. Sodium tripoly phosphate (stpp) is used as
1) a reinforcing agent in elastomers
2) a raw material in the production of food - grade phosphoric acid.
3) a builder in detergents.
4) all of these
Ans: 3
67. Turbidity of water is an indication of the presence of
1) dissolved solids
2) dissolved gases
3) floating solids
4) suspended inorganic matter
Ans: 4
68. Most efficient suitable dust removal equipment for removal of fly ash from flue gas in a thermal power plant is
1) electrostatic precipitator
2) bag filter
3) gravity settling chamber
4) cyclone separator
Ans: 1
69. Cyclone separator's working is based mainly on
1) diffusion
2) gravitation
3) centrifugal force
4) electrostatic force
Ans: 3
70. In the design of grit chambers
1) temperature is an important factor
2) the maximum velocity of flow is 1 ft/s
3) the detention period should be atleast 30 min
4) there should be a 5 to 1 ratio of length to depth.
Ans: 2
71. Chloramines are used in water treatment
1) for disinfection
2) for taste and colour control
3) as algicides
4) for weed control in reservoirs
Ans: 1
72. Ecological system or ecosystem refers to
1) a group of individuals of any one kind of organism
2) all of the population occupying a given area
3) the community and non- living environment working together
4) a portion of the earth where living objects can be found .
Ans: 3
73. For protection of acquatic life in a fresh water stream sewage effluent should never lower the dissolved oxygen content lower than
1) 15 ppm
2) 10 ppm
3) 5 ppm
4) 20 ppm
Ans: 3
74. Spetice tank are primarily used for
1) the aerobic decomposition of deposited sweage solids
2) separation of deposited solids
3) anaerobic decomposition of depsited solids
4) separation of oil & grease scums.
Ans: 1
75. Which of the following is not a component of working capital ?
1) raw materials in stock
2) finished product in stock
3) transportation facility
4) semi- finished products in the process
Ans: 3
76. For a solid processing plant , the delivered equipment cost is rs 10 lakhs . using long multiplication method, the total capital investment , in lakhs of rupees is
1) 46
2) 57
3) 100
4) 200
Ans: 1
77. A reactor needs to be lined with a corrosion resistant lining, one type of lining cost rs.5 lakhs and is expected to last for 2 years . another type of lining lasts for 3 years . if both choices have to be equally economical with the effective interest rate being 18%, compounded annually, the price one should pay for the second type of lining is
1) rs 6.1 lakhs
2) rs 6.5 lakhs
3) rs 6.9 lakhs
4) rs 7.6 lakhs
Ans: 3
78. Which one is not considered as a method for profitabiltiy evaluation?
1) payout period
2) present worth
3) cost index
4) discounted cash flow
Ans: 3
79. Which process is used for the manufacture of soda ash ?
1) haber process
2) frasch process
3) contact process
4) solvay process
Ans: 4
80. Styrene is produced from ethylbenzene by the process of
1) dehydrogenation
2) oxidation
3) alkylation
4) dehydration
Ans: 1
81. The most important process currently used for industrial production of carbon black is
1) furnace black process
2) channel black process
3) lamp black process
4) thermal black process
Ans: 1
1) raw materials in stock
2) finished product in stock
3) transportation facility
4) semi- finished products in the process
Ans: 3
76. For a solid processing plant , the delivered equipment cost is rs 10 lakhs . using long multiplication method, the total capital investment , in lakhs of rupees is
1) 46
2) 57
3) 100
4) 200
Ans: 1
77. A reactor needs to be lined with a corrosion resistant lining, one type of lining cost rs.5 lakhs and is expected to last for 2 years . another type of lining lasts for 3 years . if both choices have to be equally economical with the effective interest rate being 18%, compounded annually, the price one should pay for the second type of lining is
1) rs 6.1 lakhs
2) rs 6.5 lakhs
3) rs 6.9 lakhs
4) rs 7.6 lakhs
Ans: 3
78. Which one is not considered as a method for profitabiltiy evaluation?
1) payout period
2) present worth
3) cost index
4) discounted cash flow
Ans: 3
79. Which process is used for the manufacture of soda ash ?
1) haber process
2) frasch process
3) contact process
4) solvay process
Ans: 4
80. Styrene is produced from ethylbenzene by the process of
1) dehydrogenation
2) oxidation
3) alkylation
4) dehydration
Ans: 1
81. The most important process currently used for industrial production of carbon black is
1) furnace black process
2) channel black process
3) lamp black process
4) thermal black process
Ans: 1
82. To increase the absorption factor
1) increase both solvent flow rate and gas-flow rate
2) increase solvent flow rate and decrease gas flow rate
3) increase gas flow -rate and decrease solvent flow rate
4) decrease both solvent flow rate and gas flow rate
Ans: 2
83. A 25cm x 25cm x 1cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions . it took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. another 1m x 1m x 1cm flat sheet of the same materials is to dried from one side only. under the same constant drying rate conditions, the time required for drying (in seconds) from its weight of 19.2 kg to 17.6 kg is .
1) 1000
2) 1500
3) 2000
4) 2500
Ans: 3
84. A first-order reaction requires two equal volume cstrs. the conversion is
1) more when they are connected in parallel
2) less when connected in series
3) more when connected in series
4) same whether connected in series or parallel
Ans: 3
85. What is the exit conversion of reactant 'a' for a zero order reaction taking place in a cstr. following data: rate constant = 1 mole/min l, feed concentration = 1mole/ l; feed flow rate= 0.5 l/min and reactor volume= 1l.
1) 50 %
2) 75 %
3) 100 %
4) 200 %
Ans: 3
86. Fire triangle consists of
1) fuel , heat and oxygen
2) fuel, air and dust
3) air, dust and smoke
4) temperature , pressure and volume
Ans: 1
87. Risk is defined mathematically as
1) probability x consequences
2) probability + consequences
3) probability - consequences
4) probability / consequences
Ans: 1
88. Which of the following is not a chemical related health hazard ?
1) carcinogenicity
2) reactivity
3) corrosivity
4) toxicity
Ans: 2
89. Ammonia becomes an immediate danger to your life and health when it is present at the following level or greater:-
1) 10 ppm
2) 30 ppm
3) 300 ppm
4) 1000 ppm
Ans: 3
90. The following is indirect cost of accident
1) money paid for treatment of worker
2) compensation paid to worker
3) cost of lost time of injured worker
4) all of these
Ans: 3
91. Which of the following colour is used for radiation hazard
1) orange
2) purple
3) red
4) yellow
Ans: 2
92. The following is best suited to extinguish oil or flammable liquid fire
1) soda acid
2) vaporizing liquid
3) dry chemical
4) foam
Ans: 4
93. Dow fire and explosion index (f&ei ) of 135 calculated for a plant has the following degree of hazard:
1) light
2) moderate
3) heavy
4) severe
Ans: 3
94. In a cyclone of diameter 0.2 m, the particles enter at velocity 10 m/s . the separation factor is approximately
1) 100
2) 50
3) 200
4) 150
Ans: 1
95. A tyler standard screen of 100 mesh is made by weaving wire of diameter 0.0042 inch . the clear opening size will be
1) 0.01 inch
2) 0.004 inch
3) 0.039 inch
4) 0.0058 inch
Ans: 4
98. Break-even point is the point of intersection of
1) fixed cost and total cost
2) total cost and sales revenue
3) fixed cost and sales revenue
4) none of these
Ans: 2
99. A column costs rs 5.0 lakhs and has a useful life of 10 years . using the double declining balance depreciation method, the book value of the unit at the end of five years (in lakhs of rs.) is
1) 1.21
2) 1.31
3) 1.64
4) 2.05
Ans: 3
100. A partially miscible mixture of 50 % a and 50 % , b is separated into extract phase having 80 % . a and raffinate phase having 90% b. the ratio of extract to raffinate phase is
1) 3:4
2) 8:9
3) 1:1
4) 4:3
Ans: 4
1) increase both solvent flow rate and gas-flow rate
2) increase solvent flow rate and decrease gas flow rate
3) increase gas flow -rate and decrease solvent flow rate
4) decrease both solvent flow rate and gas flow rate
Ans: 2
83. A 25cm x 25cm x 1cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions . it took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. another 1m x 1m x 1cm flat sheet of the same materials is to dried from one side only. under the same constant drying rate conditions, the time required for drying (in seconds) from its weight of 19.2 kg to 17.6 kg is .
1) 1000
2) 1500
3) 2000
4) 2500
Ans: 3
84. A first-order reaction requires two equal volume cstrs. the conversion is
1) more when they are connected in parallel
2) less when connected in series
3) more when connected in series
4) same whether connected in series or parallel
Ans: 3
85. What is the exit conversion of reactant 'a' for a zero order reaction taking place in a cstr. following data: rate constant = 1 mole/min l, feed concentration = 1mole/ l; feed flow rate= 0.5 l/min and reactor volume= 1l.
1) 50 %
2) 75 %
3) 100 %
4) 200 %
Ans: 3
86. Fire triangle consists of
1) fuel , heat and oxygen
2) fuel, air and dust
3) air, dust and smoke
4) temperature , pressure and volume
Ans: 1
87. Risk is defined mathematically as
1) probability x consequences
2) probability + consequences
3) probability - consequences
4) probability / consequences
Ans: 1
88. Which of the following is not a chemical related health hazard ?
1) carcinogenicity
2) reactivity
3) corrosivity
4) toxicity
Ans: 2
89. Ammonia becomes an immediate danger to your life and health when it is present at the following level or greater:-
1) 10 ppm
2) 30 ppm
3) 300 ppm
4) 1000 ppm
Ans: 3
90. The following is indirect cost of accident
1) money paid for treatment of worker
2) compensation paid to worker
3) cost of lost time of injured worker
4) all of these
Ans: 3
91. Which of the following colour is used for radiation hazard
1) orange
2) purple
3) red
4) yellow
Ans: 2
92. The following is best suited to extinguish oil or flammable liquid fire
1) soda acid
2) vaporizing liquid
3) dry chemical
4) foam
Ans: 4
93. Dow fire and explosion index (f&ei ) of 135 calculated for a plant has the following degree of hazard:
1) light
2) moderate
3) heavy
4) severe
Ans: 3
94. In a cyclone of diameter 0.2 m, the particles enter at velocity 10 m/s . the separation factor is approximately
1) 100
2) 50
3) 200
4) 150
Ans: 1
95. A tyler standard screen of 100 mesh is made by weaving wire of diameter 0.0042 inch . the clear opening size will be
1) 0.01 inch
2) 0.004 inch
3) 0.039 inch
4) 0.0058 inch
Ans: 4
98. Break-even point is the point of intersection of
1) fixed cost and total cost
2) total cost and sales revenue
3) fixed cost and sales revenue
4) none of these
Ans: 2
99. A column costs rs 5.0 lakhs and has a useful life of 10 years . using the double declining balance depreciation method, the book value of the unit at the end of five years (in lakhs of rs.) is
1) 1.21
2) 1.31
3) 1.64
4) 2.05
Ans: 3
100. A partially miscible mixture of 50 % a and 50 % , b is separated into extract phase having 80 % . a and raffinate phase having 90% b. the ratio of extract to raffinate phase is
1) 3:4
2) 8:9
3) 1:1
4) 4:3
Ans: 4