Chemistry is the study of the substances that make up matter. It looks at their properties, how they react with each other, and how these reactions can create new substances.
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Question 111:
The contact process is used for the industrial production of
Options:
A) sulfuric acid (H2SO4)
B) Hydrochloric acid (HCl)
C) Sodium hydroxide (NaOH)
D) Calcium oxide (CaO)
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The correct answer is A .
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Question 112: The shape of the hydrocarbon compound CH4 is
Options:
A) square planar
B) planar
C) linear
D) tetrahedral
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The correct answer is D .
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Question 113: Crude petroleum pollutant usually seen on some Nigerian creeks and waterways can be dispersed or removed by
Options:
A) heating the affected parts in order to boil off the petroleum
B) mechanically stirring to dissolve the petroleum in water
C) pouring organic solvents to dissolve the petroleum
D) spraying the water with stergents
E) cooling to freeze out the petroleum
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The correct answer is C .
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Question 114: Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will be
Options:
A) Close to that of pure water
B) Unaltered
C) Greater than 8.4
D) Less than 8.4
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The correct answer is C .
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Question 115: Neutralization involves a reaction between H3O+ and?
Options:
A) CI-
B) OH-
C) NO3-
D) CO32-
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The correct answer is B .
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Question 116: P1V1 = P2V2 supports ?
Options:
A) Charles’s law
B) Boyles’s law
C) Graham’s law
D) Avogadro’s law
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The correct answer is B .
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Question 117: On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon is referred to as
Options:
A) efflorescence
B) diliquescence
C) hygroscopy
D) hydrolysis
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The correct answer is A .
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Question 118: A change in the temperature of a saturated solution disturbs the equilibrium between the
Options:
A) Undissolved solute and the solvent
B) Dissolved solute and the solvent
C) Dissolved solute and the undissolved solute
D) Dissolved solute and the solution
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The correct answer is C .
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Question 119:
A binary compound of oxygen with another element is referred to as?
Options:
A) Oxide
B) Element
C) Carbon
D) Nitrogen
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The correct answer is A .
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Question 120: Allotropes are elements having?
Options:
A) different physical but the same chemical properties
B) different chemical but the same physical properties
C) the same chemical and physical properties
D) different atomic structure
E) the same position in the periodic table
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The correct answer is A .