*JAMB QUESTIONS ON CHEMISTRY*
1. Which of the following is a chemical change?
A. Melting of ice
B. Boiling of water
C. Rusting of iron
D. Breaking of glass
Answer: C
2. What is the oxidation number of sulfur in H₂SO₄?
A. +4
B. +6
C. -2
D. 0
Answer: B
3. Which of the following gases is not a greenhouse gas?
A. CO₂
B. CH₄
C. N₂
D. H₂O vapour
Answer: C
4. Which particle has the same number of protons and electrons but different number of neutrons?
A. Isomer
B. Isotope
C. Ion
D. Molecule
Answer: B
5. What is the molar volume of an ideal gas at STP?
A. 22.4 dm³
B. 24 dm³
C. 1.0 dm³
D. 2.24 dm³
Answer: A
6. Which of the following represents a covalent compound?
A. NaCl
B. MgO
C. H₂O
D. CaCl₂
Answer: C
7. Which of these processes is endothermic?
A. Freezing of water
B. Condensation of steam
C. Dissolution of NH₄Cl in water
D. Combustion of methane
Answer: C
8. What is the pH of a solution with [H⁺] = 1 × 10⁻⁴ mol/dm³?
A. 4
B. 10
C. 7
D. 2
Answer: A
9. What is the IUPAC name of CH₃CH₂OH?
A. Methanol
B. Ethanol
C. Propanol
D. Butanol
Answer: B
10. Which of the following is an alkyne?
A. C₂H₆
B. C₂H₄
C. C₂H₂
D. CH₄
Answer: C
11. What is the main ore of aluminum?
A. Hematite
B. Bauxite
C. Galena
D. Magnetite
Answer: B
12. Which of these elements has the highest electronegativity?
A. Fluorine
B. Oxygen
C. Nitrogen
D. Chlorine
Answer: A
13. What is the formula mass of Na₂CO₃?
A. 106 g/mol
B. 84 g/mol
C. 40 g/mol
D. 23 g/mol
Answer: A
14. What is the oxidation number of Mn in KMnO₄?
A. +2
B. +4
C. +6
D. +7
Answer: D
15. Which of the following is a base?
A. H₂SO₄
B. NaOH
C. HCl
D. CO₂
Answer: B
16. Which of the following shows periodicity?
A. Atomic number
B. Isotopy
C. Mass number
D. Ionization energy
Answer: D
17. Which of the following is not a property of acids?
A. Sour taste
B. Turns blue litmus red
C. Reacts with bases
D. Soapy feel
Answer: D
18. The major constituent of natural gas is:
A. Methane
B. Ethane
C. Butane
D. Propane
Answer: A
19. What is the number of neutrons in ³⁹₁₉K?
A. 20
B. 19
C. 39
D. 58
Answer: A
20. The process of separating liquids with different boiling points is called:
A. Filtration
B. Crystallization
C. Distillation
D. Sublimation
Answer: C
21. What is the shape of the water molecule?
A. Linear
B. Tetrahedral
C. Angular (V-shaped)
D. Trigonal planar
Answer: C
22. Which element forms a basic oxide?
A. CO₂
B. SO₂
C. Na₂O
D. NO₂
Answer: C
23. The number of unpaired electrons in an oxygen atom is:
A. 0
B. 1
C. 2
D. 4
Answer: C
24. Which of the following has giant covalent structure?
A. NaCl
B. H₂O
C. Diamond
D. CH₄
Answer: C
25. Which of the following gases is monoatomic?
A. O₂
B. N₂
C. Ne
D. Cl₂
Answer: C
26. Which process is used to obtain pure water from salt water?
A. Filtration
B. Decantation
C. Distillation
D. Crystallization
Answer: C
27. Which of these best describes the solubility of gases in water?
A. Increases with temperature
B. Decreases with pressure
C. Increases with pressure
D. Independent of pressure
Answer: C
28. Which of the following undergoes addition reaction?
A. Alkane
B. Alkene
C. Alkyne
D. Aromatic hydrocarbon
Answer: B
29. What is the empirical formula of a compound with 40% C, 6.7% H, and 53.3% O?
A. CHO
B. CH₂O
C. C₂H₄O₂
D. C₆H₁₂O₆
Answer: B
30. The monomer of polyethylene is:
A. Ethene
B. Ethane
C. Propene
D. Methane
Answer: A
*By: HCCTEAM*
07043739142
31. Which of these metals will not liberate hydrogen from dilute HCl?
A. Zinc
B. Iron
C. Copper
D. Magnesium
Answer: C
32. The device used to measure atmospheric pressure is called:
A. Thermometer
B. Barometer
C. Hygrometer
D. Manometer
Answer: B
33. The compound that decolorizes bromine water is:
A. Ethane
B. Ethene
C. Methane
D. Ethanol
Answer: B
34. What is the major constituent of air by volume?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Argon
Answer: B
35. Which of the following is an amphoteric oxide?
A. Na₂O
B. ZnO
C. CO₂
D. SO₂
Answer: B
36. A solution that resists change in pH is a:
A. Salt
B. Base
C. Buffer
D. Acid
Answer: C
37. Which of these is an extensive property of matter?
A. Pressure
B. Temperature
C. Mass
D. Density
Answer: C
38. In redox reactions, the oxidizing agent is:
A. Reduced
B. Oxidized
C. A base
D. Neutral
Answer: A
39. The Tetraoxosulphate(VI) acid is commonly known as:
A. Nitric acid
B. Hydrochloric acid
C. Sulphuric acid
D. Acetic acid
Answer: C
40. Which of the following is used as a drying agent for acidic gases?
A. NaOH
B. CaO
C. P₂O₅
D. Conc. H₂SO₄
Answer: D
41. In electrolysis, the electrode at which oxidation occurs is the:
A. Cathode
B. Anode
C. Electrolyte
D. Salt bridge
Answer: B
42. The product formed when Na reacts with cold water is:
A. NaOH and H₂
B. Na₂O and H₂
C. NaCl and H₂
D. NaOH and O₂
Answer: A
43. Which substance contains both ionic and covalent bonds?
A. HCl
B. NaCl
C. NH₄Cl
D. CH₄
Answer: C
44. Which method is suitable for separating a mixture of iron filings and sulfur powder?
A. Sublimation
B. Evaporation
C. Magnetic separation
D. Filtration
Answer: C
45. What color is litmus in alkaline solution?
A. Red
B. Blue
C. Green
D. Yellow
Answer: B
46. Which of the following has the highest boiling point?
A. H₂S
B. NH₃
C. H₂O
D. CH₄
Answer: C
47. What is the electronic configuration of Ca (Z=20)?
A. 2,8,8,2
B. 2,8,10
C. 2,8,6,4
D. 2,10,8
Answer: A
48. Which of the following hydrocarbons is saturated?
A. Ethene
B. Ethyne
C. Ethane
D. Benzene
Answer: C
49. Which halogen is least reactive?
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Answer: D
50. An isotope of hydrogen with 1 proton and 2 neutrons is:
A. Protium
B. Deuterium
C. Tritium
D. Hydrogen ion
Answer: C
51. Which of the following is used to prevent rusting?
A. Galvanization
B. Distillation
C. Polymerization
D. Sublimation
Answer: A
52. The indicator used in strong acid–strong base titration is:
A. Methyl orange
B. Phenolphthalein
C. Litmus
D. Universal indicator
Answer: B
53. The pH of a neutral solution is:
A. 14
B. 7
C. 0
D. 1
Answer: B
54. Which of the following is a noble gas?
A. Nitrogen
B. Argon
C. Oxygen
D. Neon
Answer: B
55. What is the main component of limestone?
A. Na₂CO₃
B. CaCO₃
C. CaCl₂
D. CaSO₄
Answer: B
56. A catalyst increases the rate of a reaction by:
A. Increasing temperature
B. Lowering activation energy
C. Increasing pressure
D. Changing equilibrium position
Answer: B
57. Which of the following is not an alloy?
A. Steel
B. Bronze
C. Brass
D. Diamond
Answer: D
58. A salt formed from a strong acid and a strong base is:
A. Acidic
B. Basic
C. Neutral
D. Amphoteric
Answer: C
59. Which gas turns limewater milky?
A. CO₂
B. O₂
C. N₂
D. CH₄
Answer: A
60. An example of a deliquescent substance is:
A. NaCl
B. CuSO₄
C. NaOH
D. CaCO₃
Answer: C
61. The movement of particles from a region of higher concentration to a region of lower concentration is called:
A. Diffusion
B. Filtration
C. Osmosis
D. Effusion
Answer: A
62. What is the oxidation state of chlorine in NaClO₃?
A. +1
B. -1
C. +3
D. +5
Answer: D
63. Which of these is a strong acid?
A. CH₃COOH
B. HNO₃
C. H₂CO₃
D. HCN
Answer: B
64. Which process involves loss of electrons?
A. Reduction
B. Neutralization
C. Oxidation
D. Ionization
Answer: C
65. The ability of an atom to attract shared electrons is called:
A. Ionization energy
B. Electron affinity
C. Electronegativity
D. Atomic radius
Answer: C
66. Which of these compounds will give a precipitate with AgNO₃?
A. NaCl
B. CH₄
C. NH₃
D. NaOH
Answer: A
67. The separation technique used to purify ethanol is:
A. Sublimation
B. Fractional distillation
C. Filtration
D. Decantation
Answer: B
68. Which of the following is not a greenhouse gas?
A. CH₄
B. N₂O
C. O₂
D. CO₂
Answer: C
69. The type of bond formed between two nonmetals is:
A. Ionic
B. Covalent
C. Metallic
D. Hydrogen
Answer: B
70. Which substance is added to water to kill germs?
A. Salt
B. Lime
C. Chlorine
D. Alum
Answer: C
71. The electronic configuration of a chlorine atom (Z=17) is:
A. 2,8,7
B. 2,7,8
C. 2,6,9
D. 2,8,8,1
Answer: A
72. In the periodic table, elements in the same group have:
A. Same number of protons
B. Similar physical properties
C. Same number of valence electrons
D. Same atomic number
Answer: C
73. What is the molecular formula of a compound with empirical formula CH and relative molecular mass of 78?
A. CH
B. C₂H₂
C. C₆H₆
D. C₄H₄
Answer: C
74. The process of heating ore in the absence of air is called:
A. Roasting
B. Smelting
C. Calcination
D. Alloying
Answer: C
75. What is the color of methyl orange in acid?
A. Yellow
B. Orange
C. Pink
D. Red
Answer: D
76. Which ion is responsible for the green color of a flame test?
A. Cu²⁺
B. Ba²⁺
C. Fe³⁺
D. Cr³⁺
Answer: B
77. Which of the following is not a chemical property of an element?
A. Reactivity
B. Valency
C. Boiling point
D. Ionization energy
Answer: C
78. The formula of sodium trioxocarbonate(IV) is:
A. NaHCO₃
B. Na₂CO₃
C. NaCl
D. NaNO₃
Answer: B
79. What is the bond angle in methane (CH₄)?
A. 109.5°
B. 120°
C. 90°
D. 104.5°
Answer: A
80. Which of the following is not an organic compound?
A. Ethanol
B. Benzene
C. Glucose
D. NaOH
Answer: D
81. Which of these compounds has the lowest boiling point?
A. H₂O
B. NH₃
C. CH₄
D. HF
Answer: C
82. A hydrocarbon with general formula CnH2n-2 is an:
A. Alkane
B. Alkene
C. Alkyne
D. Alcohol
Answer: C
83. The main raw materials for the manufacture of cement are:
A. Limestone and clay
B. Limestone and coal
C. Clay and sand
D. Sand and soda
Answer: A
84. Which of these does not undergo sublimation?
A. Iodine
B. Camphor
C. Sodium chloride
D. Naphthalene
Answer: C
85. In the electrolysis of acidified water, the gas collected at the cathode is:
A. Oxygen
B. Hydrogen
C. Chlorine
D. Nitrogen
Answer: B
86. Which salt is used in photography?
A. NaCl
B. KNO₃
C. AgBr
D. MgSO₄
Answer: C
87. Which compound contains only sigma bonds?
A. Ethane
B. Ethene
C. Ethyne
D. Benzene
Answer: A
88. The main pollutant in acidic rain is:
A. CO₂
B. CH₄
C. NO₂
D. H₂S
Answer: C
89. In an endothermic reaction, the enthalpy change is:
A. Zero
B. Positive
C. Negative
D. Cannot be determined
Answer: B
90. Which substance is commonly used in the laboratory as a drying agent?
A. NaCl
B. CaCl₂
C. HCl
D. CuSO₄
Answer: B
91. A reaction in which heat is absorbed from the surroundings is:
A. Exothermic
B. Endothermic
C. Neutralization
D. Decomposition
Answer: B
92. Which of the following is an allotrope of carbon?
A. Graphite
B. Carbon dioxide
C. Methane
D. Calcium carbide
Answer: A
93. The major constituent of glass is:
A. NaCl
B. SiO₂
C. Al₂O₃
D. CaO
Answer: B
94. A redox reaction involves:
A. Loss and gain of protons
B. Loss and gain of electrons
C. Exchange of ions
D. Change in physical state
Answer: B
95. What is the correct IUPAC name of CH₃CH₂CH₂OH?
A. Ethanol
B. Methanol
C. Propanol
D. Butanol
Answer: C
96. The hydrocarbon with a triple bond is:
A. Ethane
B. Ethene
C. Ethyne
D. Propane
Answer: C
97. Which of the following pollutants is most associated with blood poisoning?
A. CO
B. NO
C. SO₂
D. CO₂
Answer: A
98. The process used in softening hard water is:
A. Filtration
B. Ion exchange
C. Distillation
D. Boiling
Answer: B
99. The main constituent of natural rubber is:
A. Polyvinyl chloride
B. Polyethylene
C. Polyisoprene
D. Polystyrene
Answer: C
100. Which of the following is used to detect the end-point in acid-base titration?
A. Acid
B. Base
C. Indicator
D. Salt
Answer: C
*2025 UTME PHYSICS DAY 1️⃣ FIRST BATCH* 🧏♂️🧏♂️🧏♂️
12 Questions that I could remember from Physics 🥲.. it was easy tho☺️
1. Which instrument is most suitable for measuring the diameter of a thin wire?
2. The SI unit of pressure is:
3. Which of the following is a vector quantity?
4. If two forces of 5 N and 12 N act at right angles to each other, the resultant force is:
5. A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is its acceleration?
6. The area under a velocity-time graph represents:
7. Work is defined as:
8. A machine has an efficiency of 80%. If the input work is 200 J, the output work is:
9. Which of the following is a good conductor of heat?
10. The amount of heat required to raise the temperature of 1 kg of a substance by 1°C is called:
11. The bending of light as it passes from one medium to another is called:
12. A real image is formed by a convex lens when the object is placed:
*[DAY1] 2025 JAMB ENGLISH LANGUAGE QUESTIONS*
1) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
In the match against the uplanders team, the sub mariners turned out to be the /dark horse/
A. played most brilliantly
B. played below their usual form
C. won unexpectedly
D. lost as expected
E. won as expected
2) Choose the option that best conveys the meaning of the underlined portion in the following sentence:
Only the /small fry/ gets punished for such social misdemeanours.
A. small boys
B. unimportant people
C. frightened people
D. frivolous people
E. inexperienced people
3) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
He spoke with his /heart in his mouth/
A. courageously
B. with such unusual cowardice
C. with a lot of confusion in his speech
D. without being able to make up his mind
E. with fright and agitation
4) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
The /leader/ in today’s issue of our popular newspaper focuses on inflation
A. president
B. headline
C. editorial
D. columnist
E. proprietor
5) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
From the ways my friend talks, you can see he is such /a bore/
A. rude
B. brilliant
C. uninteresting
D. overbearing
E. humorous
6) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
His jail terms were to run /concurrently/
A. simultaneously
B. uniformly
C. laboriously
D. consecutively
E. judiciously
7) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
There is some obvious /symmetry/ in the whole presentation
A. confusion
B. hesitation
C. excitement
D. orderliness
E. dissatisfaction
8) Choose the option that best conveys the meaning of the underlined portion in the following sentence;
The b
Check back later…..
Physics
Electrolysis
Simple harmonic motion
Heat energy
Electrical energy
Transformers
Machines
Diode
Mathematics
Calculus
Trigonometry
Probability
Number bases
Angles
Chemistry
Electrolysis
Organic chemistry
Separation methods
DAY 3 CHEMISTRY JAMB QUESTIONS
Electrolysis
- During electrolysis, oxidation occurs at the:
A) Anode
B) Cathode
C) Electrolyte
D) Salt bridge
Answer: A) Anode
- The electrolyte used in the electrolysis of brine is:
A) Sodium chloride solution
B) Copper(II) sulfate solution
C) Distilled water
D) Lead(II) nitrate solution
Answer: A) Sodium chloride solution
- Which of the following gases is liberated at the anode during the electrolysis of brine?
A) Hydrogen
B) Oxygen
C) Chlorine
D) Nitrogen
Answer: C) Chlorine
Organic Chemistry (about 40%)
- Alkanes are generally known as:
A) Saturated hydrocarbons
B) Unsaturated hydrocarbons
C) Aromatic compounds
D) Alcohols
Answer: A) Saturated hydrocarbons
- The general formula of alkanes is:
A) C_nH_{2n}
B) C_nH_{2n+2}
C) C_nH_{2n-2}
D) C_nH_n
Answer: B) C_nH_{2n+2}
- Ethene is an example of a/an:
A) Alkane
B) Alkene
C) Alkyne
D) Alcohol
Answer: B) Alkene
- Which of the following is used in the industrial preparation of ethanol?
A) Fermentation of sugars
B) Electrolysis of water
C) Burning of hydrocarbons
D) Reaction of acids
Answer: A) Fermentation of sugars
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- Which of the following is an alkyne?
A) Methane
B) Ethene
C) Ethyne
D) Ethanol
Answer: C) Ethyne
- The functional group of alcohols is:
A) –COOH
B) –OH
C) –CHO
D) –C≡C–
Answer: B) –OH
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- Which of the following compounds is an aromatic hydrocarbon?
A) Ethene
B) Benzene
C) Ethyne
D) Methane
Answer: B) Benzene
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
Gas Laws
- Boyle’s law states that at constant temperature, the pressure of a gas is:
A) Directly proportional to volume
B) Inversely proportional to volume
C) Directly proportional to temperature
D) Constant
Answer: B) Inversely proportional to volume
- Charles’ Law states that:
A) Pressure is constant when volume changes
B) Volume is directly proportional to absolute temperature
C) Volume is inversely proportional to temperature
D) Temperature is inversely proportional to pressure
Answer: B) Volume is directly proportional to absolute temperature
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- Avogadro’s law states that equal volumes of gases under the same conditions contain:
A) Equal masses
B) Equal number of molecules
C) Equal densities
D) Equal pressure
Answer: B) Equal number of molecules
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
Electronic Configuration
- The electronic configuration of sodium is:
A) 2, 8, 8
B) 2, 8, 1
C) 2, 1, 8
D) 8, 8, 2
Answer: B) 2, 8, 1
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- How many electrons are in the outermost shell of an oxygen atom?
A) 2
B) 4
C) 6
D) 8
Answer: C) 6
Preparation of Compounds
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- Oxygen gas can be prepared in the laboratory by heating:
A) Sodium chloride
B) Potassium trioxochlorate(V)
C) Calcium carbonate
D) Ammonium chloride
Answer: B) Potassium trioxochlorate(V)
- Hydrogen gas can be prepared by the action of dilute HCl on:
A) Copper
B) Sodium
C) Zinc
D) Carbon
Answer: C) Zinc
Half-Life
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- The half-life of a radioactive element is 2 hours. How much of a 20g sample remains after 6 hours?
A) 10g
B) 5g
C) 2.5g
D) 1.25g
Answer: C) 2.5g
(Solution: After each 2 hours → half. 20g → 10g → 5g → 2.5g)
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
- The time required for half the nuclei of a radioactive sample to decay is called:
A) Decay time
B) Rate of decay
C) Half-life
D) Reaction time
Answer: C) Half-life
- If a substance has a half-life of 3 minutes, how much of a 16g sample will remain after 9 minutes?
A) 8g
B) 4g
C) 2g
D) 1g
Answer: D) 2g
(Solution: 16g → 8g → 4g → 2g after 9 minutes)
https://chat.whatsapp.com/HigroIgR9r2IVaF41yjcFH
The literature it mostly novel question (look back in anger, black woman,caged bird, unexpected dawn,)
And literary devices
Physics
Specific heat capacity
Surface tension
Light wave
Chemistry
Organic chemistry o!!!!!!!!
Refractive index too
Most specially heat and those calculations that has to do with planks’s constant…and also equilibrium
Dentition
Variation
Cells
I saw like 3 questions on population
Genetics too
Government
Factism
Cooperation
Federal
Clifford constitution
Judiciary review
Military
Democracy
Monarch
The register was biology based
Stress
Emphatic stress
Opposite of words
Nearest in meaning
Flexible-rigid
Astonished-Amazed
Etc
Consonant
Vowels sounds
Stress pattern
Literature wuthering heights
Look back in anger
Caged bird
Lion and the jwel
Lekki head master I saw 3 questions
About tribal mark man who the student was scared of
Then why they named him owuala
Who is favour to Mrs ignatus
In chemistry topics like organic chemistry,molecular formula,all those alkane ,alkene group sha
Physics topics like capacitance, electrolysis and calculation on them
Section 1: Mechanics
1. What is the unit of force in physics?
a) Newton
Answer: a) Newton
2. A car accelerates from rest to 20m/s in 4s. Calculate its acceleration.
a) 5m/s²
Answer: a) 5m/s²
3. Which of the following is a vector quantity?
c) Velocity
Answer: c) Velocity
4. What is the principle of conservation of momentum?
c) Momentum remains constant in a closed system
Answer: c) Momentum remains constant in a closed system
5. A body of mass 5kg is placed on a horizontal surface. Calculate its weight.
a) 50N
Answer: a) 50N
6. Which of the following is an example of a contact force?
c) Frictional force
Answer: c) Frictional force
Section 2: Waves and Optics
6. What is the difference between a transverse wave and a longitudinal wave?
a) Direction of vibration
Answer: a) Direction of vibration
7. Calculate the frequency of a wave with a wavelength of 0.5m and speed of 300m/s.
a) 600Hz
Answer: a) 600Hz
Section 3: Electricity and Magnetism
9. What is the unit of electric charge?
b) Coulomb
Answer: b) Coulomb
10. State Ohm’s law.
a) V = IR
Answer: a) V = IR
11. What is electromagnetic induction?
a) Production of electric current
Answer: a) Production of electric current
12. Calculate the force on a current-carrying conductor in a magnetic field.
a) F = BIL
Answer: a) F = BIL
13. What is the unit of magnetic field?
a) Tesla
Answer: a) Tesla
14. Calculate the electric field intensity due to a point charge.
a) E = kQ/r²
Answer: a) E = kQ/r²
Section 4: Modern Physics
14. What is the principle of quantum mechanics?
d) All of the above
Answer: d) All of the above
15. Calculate the energy of a photon of wavelength 500nm.
a) 2.48eV
Answer: a) 2.48eV
16. What is radioactivity?
a) Emission of radiation
Answer: a) Emission of radiation
17. Calculate the half-life of a radioactive substance.
a) Time taken for half of the atoms to decay
Answer: a) Time taken for half of the atoms to decay
Section 5: Thermal Physics
21. Calculate the final temperature of a mixture of 100g of water at 80°C and 200g of water at 20°C.
b) 40°C
Let’s calculate: (100_80 + 200_20)/(100+200) = 40°C
Answer: b) 40°C
22. What is specific latent heat of vaporization?
b) Heat required to boil a substance
Answer: b) Heat required to boil a substance
23. What is thermal expansion?
d) All of the above
Answer: d) All of the above
Section 6: Work and Energy
25. Calculate the work done by a force of 10N in moving an object 5m.
Work = Force * Distance = 10N * 5m = 50J
Answer: 50J
*share with your friends and classmates!!!*
*⚠️DAY 3 CHEMISTRY JAMB QUESTIONS*
Electrolysis
1. During electrolysis, oxidation occurs at the:
A) Anode
B) Cathode
C) Electrolyte
D) Salt bridge
Answer: A) Anode
2. The electrolyte used in the electrolysis of brine is:
A) Sodium chloride solution
B) Copper(II) sulfate solution
C) Distilled water
D) Lead(II) nitrate solution
Answer: A) Sodium chloride solution
3. Which of the following gases is liberated at the anode during the electrolysis of brine?
A) Hydrogen
B) Oxygen
C) Chlorine
D) Nitrogen
Answer: C) Chlorine
Organic Chemistry (about 40%)
4. Alkanes are generally known as:
A) Saturated hydrocarbons
B) Unsaturated hydrocarbons
C) Aromatic compounds
D) Alcohols
Answer: A) Saturated hydrocarbons
5. The general formula of alkanes is:
A) C_nH_{2n}
B) C_nH_{2n+2}
C) C_nH_{2n-2}
D) C_nH_n
Answer: B) C_nH_{2n+2}
6. Ethene is an example of a/an:
A) Alkane
B) Alkene
C) Alkyne
D) Alcohol
Answer: B) Alkene
7. Which of the following is used in the industrial preparation of ethanol?
A) Fermentation of sugars
B) Electrolysis of water
C) Burning of hydrocarbons
D) Reaction of acids
Answer: A) Fermentation of sugars
8. Which of the following is an alkyne?
A) Methane
B) Ethene
C) Ethyne
D) Ethanol
Answer: C) Ethyne
9. The functional group of alcohols is:
A) –COOH
B) –OH
C) –CHO
D) –C≡C–
Answer: B) –OH
10. Which of the following compounds is an aromatic hydrocarbon?
A) Ethene
B) Benzene
C) Ethyne
D) Methane
Answer: B) Benzene
Gas Laws
11. Boyle’s law states that at constant temperature, the pressure of a gas is:
A) Directly proportional to volume
B) Inversely proportional to volume
C) Directly proportional to temperature
D) Constant
Answer: B) Inversely proportional to volume
12. Charles’ Law states that:
A) Pressure is constant when volume changes
B) Volume is directly proportional to absolute temperature
C) Volume is inversely proportional to temperature
D) Temperature is inversely proportional to pressure
Answer: B) Volume is directly proportional to absolute temperature
13. Avogadro’s law states that equal volumes of gases under the same conditions contain:
A) Equal masses
B) Equal number of molecules
C) Equal densities
D) Equal pressure
Answer: B) Equal number of molecules
Electronic Configuration
14. The electronic configuration of sodium is:
A) 2, 8, 8
B) 2, 8, 1
C) 2, 1, 8
D) 8, 8, 2
Answer: B) 2, 8, 1
15. How many electrons are in the outermost shell of an oxygen atom?
A) 2
B) 4
C) 6
D) 8
Answer: C) 6
*🔥🔥🔥🔥DAY 3 Chemistry Trend it🥰🥹⚠️⚠️⚠️⚠️*
⤵️⤵️⤵️⤵️⤵️⤵️⤵️⤵️⤵️⤵️
SHARE!!!!!!!!!!!
*JOIN THE CHANNEL FOR MORE ⤵️⤵️⤵️⤵️*
Preparation of Compounds
16. Oxygen gas can be prepared in the laboratory by heating:
A) Sodium chloride
B) Potassium trioxochlorate(V)
C) Calcium carbonate
D) Ammonium chloride
Answer: B) Potassium trioxochlorate(V)
17. Hydrogen gas can be prepared by the action of dilute HCl on:
A) Copper
B) Sodium
C) Zinc
D) Carbon
Answer: C) Zinc
Half-Life
18. The half-life of a radioactive element is 2 hours. How much of a 20g sample remains after 6 hours?
A) 10g
B) 5g
C) 2.5g
D) 1.25g
Answer: C) 2.5g
(Solution: After each 2 hours → half. 20g → 10g → 5g → 2.5g)
19. The time required for half the nuclei of a radioactive sample to decay is called:
A) Decay time
B) Rate of decay
C) Half-life
D) Reaction time
Answer: C) Half-life
For more info,join
20. If a substance has a half-life of 3 minutes, how much of a 16g sample will remain after 9 minutes?
A) 8g
B) 4g
C) 2g
D) 1g
Answer: D) 2g
(Solution: 16g → 8g → 4g → 2g after 9 minutes)