2024 WAEC Chemistry Questions and Answers: Free Expo Now Available

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The Correct 2024 WAEC Chemistry Questions and Answers are now available. Our team of experts meticulously analyzed and solved the WAEC Chemistry expo questions, providing accurate answers aligned with the marking scheme to help you achieve the highest possible score.

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Important Dates:
The West African Examinations Council has scheduled the Computer Studies exams as follows:

• Chemistry 2 (Essay) exam: , May 22th, 2024, from 9:30 am to 11:30 am.
• Chemistry 1 (Objective) exam: , May 22th, 2024, from 11:30 am to 12:30 pmm.

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WAEC Chemistry Theory (Essay) Answers

2024 WAEC CHEMISTRY (CHEM) OBJECTIVES (OBJ) ANSWERS:

1-10: BCBDBACCCB
11-20: CACCDCBCAB
21-30: BBCCBDDDCD
31-40: BCADDAACAC
41-50: BCBCDBCADA

(2a)
(I)Deliquescence is the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. This typically occurs with hygroscopic substances that have a high affinity for water.

(II)Efflorescence is the process by which a substance loses water to the atmosphere, resulting in the formation of a powdery surface deposit. This occurs when the vapor pressure of the water in the hydrated salt is greater than the partial pressure of water vapor in the air.

(2aii)
(I)Deliquescence: Calcium chloride (CaCl₂)
(II)Efflorescence: Sodium carbonate decahydrate (Na₂CO₃·10H₂O)

(2bi)
Ionization energy is the amount of energy required to remove an electron from an isolated gaseous atom or ion in its ground state. The first ionization energy refers to the energy needed to remove the first electron, while subsequent ionization energies refer to the removal of additional electrons.

(2bii)
The second ionization energy of sodium is greater than the first because, after the first electron is removed, the remaining electrons are closer to the nucleus and experience a stronger attractive force. Removing a second electron requires more energy as it disrupts the stable, noble gas configuration left behind.

(2ci)
Charles’ Law states that the volume of a given mass of gas is directly proportional to its absolute temperature, provided the pressure remains constant. Mathematically, it is expressed as:
V/T = k

(2cii)

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WAEC 2024 Chemistry OBJ Answers
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also read check this: WAEC expoz Animal Husbandry Questions 2024 (Alternative B) Verified Answers (Essay & Obj)

also read check this:2024 WAEC Computer Studies Questions and Answers: Free Expo Now Available

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