Chemistry Essay, and objective answers for 2024 West African Examinations Council is out. This WAEC Chemistry Questions And Answers is for May/June WASSCE exam. Science students who wish to have good result in chemistry are to rely on this solution. The West African Examinations Council (WAEC) is a regional examination body that conducts standardized tests for English-speaking West African countries. It plays a crucial role in assessing the academic achievements of students at the secondary school level, facilitating their progress to higher education and beyond.
We wish to inform all students that verified Chemistry expo for WAEC exam is ready. If you are part of those writing this subject, you gave nothing to worry about as the solution is available here.
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The West African Examination Council (WAEC) has meticulously planned the Chemistry exam schedule for the year 2024, with significant emphasis on ensuring a seamless experience for all candidates. Immediately following the essay, from 11:30 AM to 12:30 PM, students will tackle Chemistry 1 (Objective).
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Also Read: WAEC Physics Questions And Answers
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WAEC Chemistry Essay Answers
(1a)
An electrochemical cell is a device that converts chemical energy into electrical energy or vice versa. It consists of two half-cells, each containing a electrodes (an anode and a cathode) immersed in an electrolyte, which facilitates the flow of ions between the electrodes.
(1b)
(i)Spontaneity: Electrochemical cells are spontaneous, meaning they generate electricity on their own, while electrolytic cells require an external power source to drive the reaction.
(ii)Direction of Electron Flow: In electrochemical cells, electrons flow from the anode to the cathode, while in electrolytic cells, electrons flow from the cathode to the anode.
(iii)Purpose: Electrochemical cells are used to generate electricity, while electrolytic cells are used to drive non-spontaneous reactions, such as electroplating or water splittings.
(1c)
(i)The blue color of the copper sulfate solution starts to fade as zinc replaces the copper.
(ii)Solid copper begins to precipitate out of the solution, forming a reddish-brown deposit at the bottom of the beaker.
(iii)The solution might gradually become colorless if all the copper ions are replaced.
(iv)Bubbles of hydrogen gas may be observed if the zinc is in excess, indicating the occurrence of further reactions involving the zinc and the sulfate or the acidic solution.
(1di)
CH4(g) -> C(s) + 2H2(g)
(1dii)
Decomposition reaction
(1e)
(i) hydrogen chloride (HCl)
(ii)sulfur dioxide (SO2).
(1f)
(i)high temperature
(ii)presence of a catalyst
(iii)longer hydrocarbon chain length.
(1g)
Noble gases are chemically inert because they have a completely filled outer shell of electrons, making them very stable and unlikely to react with other elements.
(1h)
(i)Members have the same general formula
(ii)Members have similar chemical properties
(iii)Members have a gradual change in physical properties
(iv)Members have a constant difference in molecular formula between successive members
(1i)
Global warming refers to the long-term rise in the average surface temperature of the Earth due to the increasing levels of greenhouse gases in the atmosphere.
(j)
increasing levels of carbon dioxide (CO2) in the atmosphere, primarily due to fossil fuel burning, deforestation, and land-use changes.
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How To Get The WAEC Chemistry Questions Answers 2024
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2023 WAEC Chemistry Answer
(1a)
Transition element can be defined as an element in which at least one of its simple ions or atoms has an incomplete inner shell of d-electrons. They are known as d-block elements. They are in three rows with ten elements in each row
(1b)
i – B
ii – C
(1c)
There is an increase in the first ionization energy accross the periodic table due to increase in the number of volume electrons leading to an increase in the screening effect and nuclear attraction between the nucleus and the outermost electrons.
(1d)
– Alkane eg Butane
– Alkene eg Ethene
(1e)
Alkanols are stronger base than water due to the presence of hydroxyl ions (OH-) in them.
(1f)
– Salt (Nacl)
– Limestone (CaCO3)
– Ammonia (NH3)
– Coke (C)
Effective Strategies for Preparing for the WAEC Chemistry Exam
Preparing for the West African Examination Council (WAEC) Chemistry exam requires a structured and comprehensive approach to ensure success. Understanding the exam format is crucial. The exam typically consists of two sections: essay and objective. Familiarizing oneself with the types of questions in these sections can make a significant difference. The essay section usually demands detailed explanations and problem-solving skills, while the objective section tests quick recall and understanding of fundamental concepts.
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