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This is actually the 2018 NABTEB GCE. CHEMISTRY ANSWERS. Answers as questions sent to our subscribers on WHATSAPP, if you are looking for 2020 WAEC/NECO Answers midnight before the exam, try contacting us.
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(1ai)
(i) Alpha Radiations --> positively charged particles.
(ii) Beta Radiations --> Negatively charged particles.
(iii) Gamma Radiation --> Neutral(has no charge)
(1aii)
(i) Small amount of heat is involved in reaction involving chemical reaction; whereas greater amount of heat (energy) is liberated in nuclear reactions.
(ii) The nucleus of an atom is not affected in chemical reaction, whereas the nucleus of an atom is affected in nuclear reaction.
(1aiii)
Draw the chemical equation
(1b)
Given that X is 1s² 2S² 2P^6 3S² 3P^5
(i) Atomic number of X is 17
(ii) Group 7 or (VII)
(iii) They are electronegative elements. They ionize by gain of one electron.
(iv) X is chlorine
(1ci)
I. Because graphite contains carbon atoms arranged in layers with break forces between it's layers, thereby making it slippery hence it is used as a lubricant.
II. Because diamond is the hardest substance : resulting from the giant crystalline forces in its molecule.
(1ciiii)
HCl(g) + NH3(g) -->NH4Cl
(1ciii)
Combination reaction/Neutralization.
(1civ)
A white solid at the upper part of the test tube.
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(2ai)
Arrhenius defined base as a substance which gives hydroxide ions, (OH-) in water.
(2aii)
NaOH
(2aiii)
(I) C12H22O11 - Non electrolyte.
(II) NH3 - Weak electrolyte.
(II) NaOH - Strong electrolyte.
(2aiv)
CH3COOH(aq) + KOH(aq) --> CH3COOK(aq) + H2O(l)
(2b)
HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l)
Mole ratio 1 : 1
Ca = Molar conc of the hcl, 0.500moldm-³
Cb = Molar conc of NaOH, 0.3moldm-³
Vb = Volume of base, 20.00cm³
Va = ?
CaVa/CbVb = na/nb
Va = CbVbna/Canb
Va = 0.3×20×1/(0.5×1)
Va = 12cm³
(2c)
(i) NaOH - sodium hydroxide
(ii) Mg(HCO3)2 - Magnesium hydrogentrioxocarbonate(IV)
(2di)
Standard solution is one in with a concentration which is accurately known must be used to react with a solution of unknown concentration.
(2dii)
NaOH because its a soluble base.
(2e)
Fe(s) + 2HCl(g) ---> FeCl2(s) + H2(g)
1 mole of Fe requires 2 mole of HCl for complete reaction.
Mole = molarity × volume in dm³
Mol = 2.2×0.05
Mol = 0.11mol of HCl
2mol of HCl requires 1 mol of Fe
0.11mol of HCl will require 0.55mol of Fe
Mol = mass/molar mass
Molar mass = mass/mole
Mass of Fe = 3.08g
Mole = 0.55mol
Molar mass of Fe = 3.08/0.55
Molar mass = 56gmol ^-1
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(3ai)
Soda lime is not deliquescent where caustic soda is deliquescent.
(3aii)
-It is partially soluble in water.
-It is a colourless and odourless gas.
-It is denser than air.
(3aiii)
(I) Emperical Formular:
Elements: C H
%composition: 82.76 17.24
Relative atomic mass: 12 1
Ratio: 82.76/12 17.24/1 6.8966 17.24
Ratio/smaller ratio = 6.8966/6.8966 17.24/6.8966
1 2.499
= 1 2.5
Then using a multiplication factor of 4, since the mole ratio did not turn out to become whole numbers;
1 mol of C × 4 = 4 mol of C
2.5 mol of H×4 = 10 mol of H
Hence, the empirical formula of the hydrocarbon is C4H10
(II) Finding the molecular formula of the hydrocarbon:
Recall that vapour density
V.D*2 = Molecular mass, since V.D = 29, Hence MM = 29*2 = 58gmol^-1
Hence(C4H10)n = 58
(12*4+1*10)n = 58
(48+10)n = 58
58n = 58
n = 58/58 = 1
Hence mm = C4H10 --> molecular formula
(3bi)
Isomerism is the existence of two or more compounds with the same molecular formula but different structural formula.
(3bii)
Draw the chemical equation
(3biii)
Ethanol and dimethylether(methoxymetane)
(3biv)
Ethanol belongs to the alkanol family with higher boiling point WHILE dimethylether belongs to ether family ie different homologous series with lower boiling point.
(3c)
From the qualitative & quantitation analysis :
(i) The cation and anion present in a given compound.
(ii) The family of the elements of compound present in the given substance.
(iii) The amount or concentration of a given substance present in the solution or required to react with a known amount of a substance.
(3d)
Pass both Propene and Propane over bromine water, propene gas decolourizes bromine water while propane does not.
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(4a)
(i) Coal tar
(ii) Ammoniacal liquor (liquid)
(iii) Coal gas(gas)
(4b)
(i) Carbon(ii)oxide CO, carbon(iv)oxide CO2 and hydrogen gas H2(g)
(ii) This is because of the presence of carbon(II)oxide CO.
(4ci)
C(s) + O2(g) ---> CO2(g)
(4cii)
(I) Physical Properties:
(i) It is a colourless gas.
(ii) It is an odourless gas.
(II) Chemical properties:
(i) It dissolves in water to form weak acid.
(ii) It reacts with alkali to form trioxocarbonate(iv)
(4di)
-Crystalline : Diamond and Graphite.
-Amorphous : Wood charcoal, Animal charcoal, Soot.
(4dii)
- Diamond is used in decoration and as Ostentation material.
- Graphite is used as a conductor/electrode.
- Wood charcoal is used in gas masking.
- Animal charcoal is used in decolorizing crude sugar.
- Soot is used in making polish.
Yes. You can gain admission into any institution in Nigeria with your NECO result. This is because, NECO is a national examination body, which is is responsible for conducting examination for students who are aspiring to further their education to tertiary level in Nigeria. ... They all accept NECO results in Nigeria.
The West Africa Examination Council (WAEC) is the governing body conducting the WASSCE.
NECO SSCE External Candidates Original Result Slips Cost: The Sum of One Thousand Naira Only (N1,000). NECO SSCE External Candidates Issuance of Original Certificate Cost: The Sum of One Hundred Naira Only (N100).
The most effective practice is to work a short time on each class every day. The total amount of time spent studying will be the same (or less) than one or two marathon library sessions, but you will learn the information more deeply and retain much more for the long term?which will help get you an A on the final.
NECO registration form 2020 price is Eleven Thousand , Three Hundred And Fifty Naira Only (N11,350) Nine Thousand, Eight Hundred And Fifty Naira Only (N9,850) following the reduction of JAMB UTME form price and NECO form price in 2018.
NECO seems less difficult compared to WAEC but not also easy to make A's.
?The reality of the situation is ? with Proctor U or traditional testing ? nothing is cheat-proof. ?A well-working testing program is one that admits that you're going to have vulnerabilities that are going to pop up from things you had not even thought of.
You are never to old to start college. In fact, at 22 you will be in great company. Non-traditional students are typically more focused on their school work and tend to do better on assessments, when compared to their 18-21-year old classmates.
a pass (D7 and E8) in Mathematics is accepted. The Oke-Ogun Polytechnic requires credit passes in English Language, Economics, Government and a pass (D7 and E8) in Mathematics.
The following are the approved fees for the examination and other related items: Registration fees ? 4,000.00 Naira (Mandatory fee) Late Registration ? 1,000.00 Naira per candidate ? (Mandatory fee) Re-Sit Exam ? 1,000.00 Naira per copy.
List of Universities that accepts O'level Pass (D7) in English and courses you can use D7 in English Language to study. Most universities requires at least a O'level credit pass (C6) in English language to gain admission in their school both some accepts O'level D7 (Pass) in English.
To cheat on a test using school supplies, try hiding a crib sheet inside your shirt or under the cover of your calculator. You can also put two pieces of paper on top of each other and write your notes on the top page, taking care to press down hard so the bottom sheet has imprints of your notes on it.
Senior Secondary School Certificate Examination (SSSCE) issued by the West African Examination Council (WAEC). A minimum grade of B3 required. Finally, there are other universities in Canada the accepts WAEC/WASSCE/SSCE/NECO results.
College/University is definitely not free in Canada, unless you get a scholarship or one of your parents works at an institution where they provide that benefit to the children of employees. e.g. Ontario has the highest average undergraduate tuition at about $7800 per year (2 semesters) in the 2015/2021 year.
But if not, Zoom can be used to proctor, and prevent cheating. That is, students will have to keep Zoom running while they take their exam. This presence ensures (to the extent possible) they are not asking others for help, or leaving the room.
You are required to get at least a credit pass (50%) in your core subjects. Under the new WAEC grading system, A1 is Excellent, B2 Very Good, B3 Good, C4, C5 and C6 are interpreted as Credit, D7 and D8 are interpreted as Pass, while F9 is Fail.
The fact is your O'level result; be it WAEC , NECO or NABTEB is valid for a life time and has no expiration date. The Examination conducted by these examination bodies is known as ?achievement test? and therefore the certificates awarded are valid forever.
The idea that C is the best answer to choose when guess-answering a question on a multiple choice test rests on the premise that ACT answer choices are not truly randomized. In other words, the implication is that answer choice C is correct more often than any other answer choice.
WAEC is the exams body in charge of senior secondary school exams called West African Examination Council. They conduct both WAEC May/June SSCE for school candidates and WAEC Feb./March or August/September for private candidates - also called WAEC GCE. ... Secondary school can be: Senior secondary school i.e SSS 1 to 3.
The basic requirements for collection of original certification is the verification of the candidate original O level result. Neck stand for national examination council and the original neck result is always available after 4 years.
National Examinations Council, otherwise known as NECO, is a national examination body established by the Nigerian government to conduct examinations. Unlike WAEC, NECO is a national examination body vested with the responsibility to oversee specified exams only in Nigeria.
Postgraduate: University of the West Indies - A score of B, 65% or GPA of 3.0 is considered comparable to a UK 2.1, while a score of B-, 60% or GPA of 2.7 is considered comparable to a UK 2.2. ... A Level or CAPE grades will also be considered alongside degree scores.
Currently, waec no longer allow students to go home with their question papers. So, when you ask? does waec repeat past questions? Just have it in mind that the past questions you are talking about is the old past questions. And we all know that waec usually change syllabus, and English language do change as well.
The WAEC examination is open to both private and school candidates. ... Most universities in Germany accepts WAEC results from West African students. So, you need to meet their minimum requirements before you're offered admission into a German university.
We released SSCE results in 43 days ? NECO. The National Examinations Council has said it released the last Senior Secondary Certificate Examination results in 43 days.
WAEC result is not valid for 10 years ? waec registrar. ... the registrar clearly stated that Waec result is valid for life. Waec result does not expire in as much as the owner is still alive, the result can be used .
Candidates are expected to pay a registration fee of Thirteen Thousand, Nine Hundred and Fifty Naira (N13,950) only. There's an extra bank charge of N500.
See Answer. Can i Use my NABTEB Result to study at any University or Institution Abroad? ... The Results offered after participating in NABTEB Examination is called NABTEB RESULT and it can be used to gain admission into Universities, Polytechnics or Colleges of Education.
For any certificate you seek abroad, you need your high school results. ... The National Examinations Council (NECO) certificate and the General Certificate of Education (GCE) are also accepted at the embassy but in rare occasions. However, your future school may not.
Students with good WAEC result can enroll into universities abroad and most institutions in abroad offers admissions to students with WAEC results as long as they agree to undertake a foundation course.
What is GCE? It is General Certificate Examination. The GCE as it usually called by many people are two based on the bodies that conduct them. There is the West African Senior School Certificate Examination (WASSCE) for school private candidates in November/December.
This examination is offered during summer (April to May), and the results are available by August.
Prof Yankah said that although there are only a few state-owned universities in Ghana, they control about 80 percent of student enrollment. ... Prof Emmanuel Adow-Obeng, who suggested that WASSCE students with grade D7 and E8 in the core subjects be allowed to enter the universities through an access course programme.
Probably not, you still have a degree. It's pretty bad though as you are competing with grads with 2:1 for good jobs. You can hustle to work on your CV and gain skills in the next few years, but opportunities would come as easily as someone with a 2:1 or 1st.
The answer is yes. NECO can be used to study abroad but not all schools abroad accept it. ... First of all, an applicant with a NECO result must sit for a proficiency English language exam such as GRE, IELTS, SAT, ACT, PSAT, TOEFL, GMAT, and the likes.
Currently, public universities don't accept D7 for core subjects in admission purposes.
How much is Canada Student visa fee in Nigeria? The fee for Canada student visa in Nigeria varies from time to time. At this time, the fee for the study permit is about $150 (CAD) and then biometrics fee is $85 (CAD). You will also need to pay a service fee of $45.
Obtain N300,000 Cash Grant for your Education Now. Reasons Why NECO Result is Accepted for Study in Canada. You sure read that correctly, NECO result is accepted for study in Canada if you did't know.
The best study spot is one that is quiet, well-lit, and in a low-traffic area. Make sure there is a clear workspace to study and write on. For every 30 minutes, you study, take a short 10-15 minute break to recharge. Make studying less overwhelming by condensing notes from class.
It's hard to compare precisely. Matric covers a broad range of subjects like GCSEs do in the UK, which we write at 16. Matric is written at 18 and probably to a slightly higher standard than GCSE level but definitely below the A-Level exams we do at 18, when normally we only do 3-4 subjects.
Although the 16 years age limit requirement for university admission has no legal backing, it has become the gold standard for some universities in Nigeria, which had in their post-Unified Tertiary Matriculation Examination (UTME) advertorial stated that ?candidates, who will not be 16 years of age by October 31, 2018, ...
According to the timetable, the West African Senior School Certificate Examination (WASSCE) for school candidates, 2020, will commence on 6th April, 2020 and will end on 5th June, 2020.
Six years of elementary school is followed by six years of secondary school. Junior Secondary school consists of JSS1, JSS2 and JSS3 which are equivalent to the 7th, 8th and 9th Grade while the Senior Secondary school consists of SS I, SS 2, and SS 3 which is equivalent to the 10th, 11th and 12th Grade.
It means that you have scored 39% or less on your exam. It is a failure grade. E8 (40-44%) and D7 (45-49%) are passing grades. C6 (50-54%), C5 (55-59%) and C4 (60-64%) are credit grades.