WAEC GCE Chemistry Practical Questions and Answers 2023
by Alaguvelan M
Updated May 30, 2023
WAEC GCE Chemistry Practical Questions and Answers 2023
The West African Examination Council (WAEC) GCE Chemistry Practical exam is an important component of the WAEC GCE Chemistry exam. It is usually taken by candidates who wish to further their academic pursuits, either at the tertiary level or in certain professional fields.
The Chemistry Practical exam is designed to test candidates' knowledge and understanding of practical chemistry, as well as their ability to apply theoretical knowledge in the laboratory setting. In the exam, candidates are usually provided with a range of chemical reagents, instruments, and apparatuses, and are required to carry out a series of experiments within a specified time period. The experiments may cover a wide range of topics, including qualitative and quantitative analysis, stoichiometry, acid-base titration, and more.
To perform well in the Chemistry Practical exam, candidates need to have a solid understanding of basic chemistry concepts and laboratory techniques. They also need to be able to follow instructions carefully, work accurately and efficiently, and interpret experimental data effectively. It is also important for candidates to be familiar with common laboratory safety guidelines and practices, to ensure that they can work safely and avoid accidents or mishaps in the laboratory.
In preparation for the Chemistry Practical exam, candidates are advised to study the WAEC GCE Chemistry syllabus thoroughly and to also practice various laboratory techniques and experiments ahead of time. This will help them to build confidence in their practical skills, as well as to identify any areas of weakness or where they need to improve. Finally, it is also important for candidates to pace themselves effectively during the exam and to manage their time efficiently, in order to complete all the necessary experiments and tasks within the allotted time period.
The WAEC GCE Chemistry Practical exam is an important and challenging component of the GCE Chemistry exam and requires careful preparation, attention to detail, and strong practical and theoretical skills.
WAEC GCE Chemistry Practical Past Questions and Answers
1. What condition favors the formation of the product for the endothermic reaction, N2O4(g) —><—– 2NO2(g)
ANSWER: A ( Decrease in pressure)
2. How many alkoxy alkanes can be obtained from the molecular formula C4 H4O4
ANSWER: C (3)
3. Element Y has two isotopes Y and Y present in the ratio 1:3. The relative atomic mass of Y would be
ANSWER: C (21.5)
4. 100.0g of KClO3 was added to 40.0 cm^3 of water to give a saturated solution at 298K. If the solubility of the salt is 20.0 moldm^-3 at 298K, what percentage of the salt is left undissolved? {K= 39, Cl = 35.5, O = 16}
ANSWER: D (2%)
5. Elements X and Y have electronic configurations 1S22S22P4 and 1S22S22P63S23P1 respectively. When they combine the formula of the compound formed is
ANSWER: B (Y2X3)
6. A solution of 0.20 mole of NaBr and 0.20 mole of MgBr2 in 2.0 dm3 of water is to be analyzed. How many moles of Pb(NO3 )2 must be added to precipitate all the bromide as insoluble PbBr2
ANSWER: A (0.30 mol)
7. Na2CO3 + HCl —-> NaHCO3 + NaCl. The indicator most suitable for this reaction should have pH equal to.
ANSWER: D (9)
8. A saturated solution of silver trioxocarbonate (IV), was found to have concentration of 1.30 x 10-5 moldm-3 . The solubility product of the trioxocarbonate (IV) is
ANSWER: A (8.79 x 10-15)
9. When platinum electrodes are used during the electrolysis of copper (II) tetraoxosulphate (IV) solution, the solution gets progressive
ANSWER: A (Acidic)
10. Tetraoxosulphate (VI) ions are the final test using
ANSWER: D (dilute hydrochloric acid)
How Many Questions Are to be Answered in WAEC GCE Chemistry Practical?
The WAEC GCE Chemistry Practical examination comprises three questions that candidates must answer. These questions cover various topics such as qualitative analysis, quantitative analysis, chemical bonding, stoichiometry, equilibrium, electrochemistry, and organic chemistry. Through a series of experiments, candidates are expected to demonstrate their understanding of theoretical concepts. These experiments are designed to assess their ability to identify unknown substances, determine solution concentrations, calculate quantities of substances in reactions, write balanced chemical equations, and explain the principles behind chemical reactions. It is important to note that the WAEC GCE Chemistry Practical examination is a mandatory component of the GCE examination, and candidates who do not pass this practical exam will not receive a certificate.
During the examination, candidates are required to perform a series of experiments to demonstrate their knowledge and skills. These experiments are carefully designed to test the candidates' ability to apply theoretical concepts in a practical setting. By conducting these experiments, candidates are expected to showcase their proficiency in several areas.
One of the key aspects is qualitative analysis, where candidates must identify unknown substances by conducting various tests and observations. This requires them to understand the characteristic properties of different compounds and employ appropriate techniques to determine their composition.
Quantitative analysis is another important component, where candidates are tasked with determining the concentration of a given solution. This involves employing techniques such as titration or spectrophotometry to accurately measure the amount of a particular substance present in a solution.
WAEC
The West African Examinations Council (WAEC) is a prominent examination board that has been established by law to design and conduct public examinations in the English-speaking West African countries and to award certificates that are comparable to those issued by equivalent examining authorities across the world. Established in 1952, the council contributes to education in Anglophone countries of West Africa, such as Ghana, Nigeria, Sierra Leone, Liberia, and the Gambia. WAEC coordinates a wide range of examinations and has formed an endowment fund to support education in West Africa, through lectures and aid to those who cannot afford education. With well-trained and motivated staff, WAEC has administered examinations that are valid and of practical relevance to the educational aspirations of member countries.
WAEC has been successfully conducting examinations since its inception, and in a typical year, over three million candidates register for the exams coordinated by WAEC across West Africa. WAEC has worked towards helping other examination bodies in coordinating Examinations and has formed strong committees to oversee the smooth conduct of its examinations. WAEC conducts four categories of examinations covering various aspects of education, including general education, national vocational certification, international exams, and private candidates’ one series exams.
WAEC has also established an Endowment Fund that gives lectures, seminars, and scholarship awards to deserving students from the member countries. The Council has a strong vision to be a world-class examining body, adding value to the educational goals of its stakeholders. The Council's core mission is to maintain the standard it has achieved and to continuously improve its examinations. WAEC senior staff members including the Heads of Office are appointed from among citizens of the member countries.
However, there have been some concerns about the efficiency of WAEC as a body, ranging from issues of irregularities in the conduct of examinations to the inadequacy of examination materials. Despite these challenges, WAEC continues to contribute immensely to education in West Africa through the smooth conduct of its examinations and its efforts to equip students with the necessary skills and knowledge to succeed in today's world.
WAEC GCE Chemistry Practical Questions and Answers 2023 - FAQs
The topics covered in the exam include qualitative and quantitative analysis, acid-base titration, organic chemistry, and others.
The number of questions may vary from year to year, but candidates are typically required to answer a set of practical questions.
No, candidates are not allowed to bring their own equipment or chemicals to the exam. All necessary equipment and materials will be provided.
The practical questions may be a combination of multiple-choice, short-answer, and long-answer questions that test various aspects of chemistry.
The duration of the exam may vary from year to year, but candidates are typically given a set amount of time to complete the practical questions.