CHEMISTRY 2024 UTME PAST QUESTION
1. Which of the following elements will exhibit the most electronegative character?
A. Al
B. Si
C. P
D. S
2. Acid hydrolysis of nitriles will yield?
A. Alkanes
B. Aldehydes
C. Carboxylic
D. Alcohols
3. How many isomers of C4H9OH will be tertiary alkanol?
A. 1
B. 2
C. 3
D. 4
4. Which of the following makes oils distinguished from fats?
A. Oil contains a higher proportion of unsaturation
B. Fats contain a higher proportion of unsaturation
C. Oil and fats have the same proportion of unsaturation
D. Neither oil nor fats have unsaturation.
5. The only factor that affects the internal energy of an ideal gas is
A. Pressure
B. Temperature
C. Volume
D. Number of moles
6. The element X that can combine with oxygen to form an oxide of the form XO
2
is
A. Sulphur
B. Fluorine
C. Chlorine
D. Phosphorus
7. Rust on the surface of a metal sheet contain
A. Fe
3
O
4
B. Hydrated Fe
2
O
3
C. Hydrated Fe
4
O
4
D. FeCO
3
8. In the food processing industry, the separation technique used for analytical purpose is
A. Crystallization
B. Distillation
C. Chromatography
D. Centrifugation
9. An example of a solid–gas mixture is
A. Smoke
B. Foam
C. Fog
D. Mist
10. Which of the following metals react with water at the fastest rate?
A. NaCl
B. Na
2
CO
3
C. Na
2
SO
4
D. NaHSO
4
11. Which of the following metals react with water at the fastest rate?
A. Calcium
B. Magnesium
C. Sodium
D. Iron
12. The brown ring test is used to detect the presence of
A. Nitrate ions
B. Sulphate ions
C. Chloride ions
D. Phosphate ions
13. The solubility of a solid in a liquid is increased by
A. decreasing the temperature
B. increasing the pressure
C. increasing the surface area of the solid
D. decreasing the volume of the solvent
14. The addition of charcoal to a filter bed in a town water supply is for the purpose of
A. Removing heavy metals
B. Removing bacterial and viruses
C. Removing chlorine and organic compound
D. Softening the water.
15. The reaction between ethanol and phosphorous (V) chlorine produces
A. Phosphorous (III) chloride
B. Phosphorous (V) oxide
C. Phosphorous ox chloride
D. Phosphorous (III) oxide
16. The dominate intermolecular forces in ethanol are
A. London dispersion forces
B. Dipole-dipole forces
C. Hydrogen bonding
D. In-dipole forces
17. The method suitable for separating suspended particles in a liquid is
A. Distillation
B. Filtration
C. Magnetization
D. Crystallization
18. The purity of common salt (NaCl) can be determined by
A. measuring its boiling point
B. measuring sits density
C. measuring its melting point
D. measuring its solubility
19. The IUPAC name for the compound HOCH
2
CH
2
CH
2
OH is
A. Pentan-1 ,2-diol
B. Propan-1,3-diol
C. Propan-1,2-diol
D. 1,2-dihydroxypropane
20. The purest form of natural water is
A. Spring water
B. River water
C. Lake water
D.Rain water
21. What is the main difference between empirical and molecular formulae?
A. Empirical formula shows isotopes while molecular formula shows dose not
B. Empirical formula shows the simplest whole-number ratio of atoms while molecular formula show the actual number of atoms in a molecule
C. Empirical formulae are used for ionic compounds while molecular formulae are used for covalent compounds
D. Empirical formulae are used for gases while molecular formulae are used for solids
22. Which of the following bond types involves the transfer of electrons?
A. Hydrogen bonding
B. Ionic bonding
C. Covalent bonding
D. Dipole-dipole interactions
23. What the significance of the equilibrium constant (Kc) in a chemical reaction?
A. It determines the type of catalyst used
B. It determines the bond types in the reacting species
C. It determines the concentrations of the reactants and products
D. None of the above
24. What is the term for the minimum amount of energy required for a chemical reaction to occur
A. Activation energy
B. Ionization energy
C. Dissociation energy
D. Kinetic energy
25. What is the term for the amount of heat energy required to raise the temperature of a unit mass of a substance by 10C?
A. Specific heat capacity
B. Molar heat capacity
C. Latent heat
D. Heat of fusion
26. The mist suitable method for separating a mixture of ethanol and water is?
A. Activation energy
B. Ionization energy
C. Dissociation energy
D. Kinetic energy
27. The molecular formula of a compound with an empirical formula CH
2
O and a molar mass of 180g/mol is?
A. C
3
H
6
O
3
B. C
6
H
12
O
6
C. CH
4
O
D. C
4
H
8
O
2
28. The hybridization of carbon in ethene is?
A. sp
B. sp
2
C. sp
3
D. sp
3
d
29. Which of the following elements has the highest electronegativity?
A. Sodium
B. Fluorine
C. Carbon
D. Nitrogen
30. Which of the following is exothermic?
A. Melting of ice
B. Dissolution of ammonium chloride in water
C. Combustion of methane
D. Evaporation of water
31. Determine the pOH of a solution of H
2
SO
4
whose concentration is 0.001M
A. 11.3
B. 2.7
C. 14 C
D. 3.54aaaaa
32. Which of the following halogens is the least reactive?
A. Fluorine
B. Iodine4
C. Chlorine
D. Bromine
33. In the electrolysis of dilute H2SO4, the gas produced at the anode is?
A. Hydrogen gas
B. Sulphur (IV) oxide
C. Oxygen gas
D. Hydrogen gas
34. Which of the following gases can be collected over water?
A. HCL
B. NH
3
C. CO
2
D. CL
2
35. The main ore of aluminum is?
A. Galena
B. Bauxite
C. Haematite
D. Magnetite
36. Which of the following reactions is redox?
A. NaOH +HCl → NaCl + H
2
O
B. 2Mg + O
2
→ 2MgO
C. AgNO
3
+ NaCl → AgCl + NaNO
3
D. CaCO
3
→ CaO + CO
2
37. The number of unpaired electrons in a ground – state nitrogen atom is?
A. 1
B. 2
C. 3
D. 4
38. The bond angle in methane is?
A. 90
0
B. 109.5
0
C. 120
0
D. 180
0
39. Which of the following is not a property of transition metals?
A. Formation of colored compound
B. High melting points
C. Low density
D. Variable oxidation states
40. The correct order of increasing boiling points for the following compounds is?
A. CH
4
<
C
2
H
6
<
C
3
H
8
<
C
4
H
10
B. C
4
H
10
<
C
3
H
8
<
C
2
H
6
<
CH
4
C. C
2
H
6
<
CH
4
<
C
2
H
6
<
C
2
H
6
D. C
3
H8
<
C
4
H
10
<
CH
4
<
C
2
H
6
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