2020/2021 WAEC/NECO Answers: WAEC GCE 2021. Chemistry 3 answers
2020/2021 WAEC/NECO Answers: WAEC GCE 2021. Chemistry 3 answers
===COMPLETED===
Exam Time: Monday, 17th September, 2018
Literature-In-English 2(Prose) 9.30am 10.45am
Literature-In-English 1 (Objective) 10.45am 11.45am
Literature-In-English 3 (Drama & Poetry ) 2.00pm 4.30pm=====================================
Literature OBJ:
This is actually the WAEC GCE 2018. Chemistry 3 answersAnswers as questions sent to our subscribers on WHATSAPP, if you are looking for 2020 WAEC/NECO Answers midnight before the exam, try contacting us.
1-10: ABCDBCBCDB
11-20: CACDDCABAD
21-30: ABACCCBCCC
31-40: CBDACADDDB
41-50: CDBCBAACA
(2)
A is HCl(aq)
B is ZnSO4(aq)
C is NaOH(aq)
D is Pb(NO3)2(aq)
Reasons:
Row 1: Hcl is used to distinguish pb²+ from Zn²+ ions since both behave alike with NaOH. It gives a white precipitate with pb²+ ions but not with Zn²+. The first row obviously shows that. Also there is usually no visible reaction when Hcl(A) and NaOH are mixed (c)
Row 2: When A and B mixes, the products Zncl2 and H2SO4 are soluble hence no visible reaction is seen. Between B and D, a white precipitate is seen because PbSO4 is insoluble. Between B and C, Zn²+ ions yield a while gelatinous precipitate with NaOH
=======================================
(3ai)
Sodium is stored under paraffin oil to prevent its oxidation by atmospheric gases
(3aii)
Desiccator lid must be greased with a thin layer of grease, to ensure an airtight seal.
(3aiii)
Because it is hygroscopic
(3bi)
Add an acid eg HCL and this gives a neutralization reaction and the indicator react with the acids. Heat the solution to obtain the NaCL(s)
(3bii)
Dip a rod in aqueous Ammonia and dip in a beaker containing the acids, only HCl produces dense white fumes of ammonium chloride
(3ci)
(i)Beaker
(ii)glass rod
(iii)volumetric flask
(3cii)
On adding the dilute HCL to Na3SO3 a gas with a chocking smell evolves
==================================
(1ai)
Tabulate:
Burette reading |1 |2 |3 |
final reading |24.80|34.50|20.65|
initial reading |0.00 |10.50|6.55 |
vol of acid used|24.80|24.00|24.10|
(1aii) Average volume of A used
Va = 24.00 + 24.10/2
= 24.05cm³
(1bi)
Concentration of A in moldm-³
A contains 0.79g of KMnO4 per 250cm³ of solution.
Hence since 250cm³ = 0.79g
100cm³ = Xg
X = 1000×0.79/250 = 3.16g
Hence Conc in g/dm³ of A = 3.16gdm-³
But molar conc = mass conc(gdm-³)/molar mass(g/mol)
Hence molar Conc.Of A= 3.16gdm-³ /molar mass ofA
But molar mass of A = KMnO4
= 39 + 55 + 4(16) = 39 + 55 + 64
= 158g/mol
Hence Conc in moldm-³ of A = 3.16gdm-³/158g/mol
= 0.020moldm-³
(1bii)
To get concentration of B in moldm-³, we use the relation
CAVA/CBVB = na /nb
Where,
CA = 0.02moldm-³
VA = 24.05cm-³
na = 1
CB = ?
VB = 25.0cm³
nb = 5
0.02×24.05/CB×25 = 1/5
CB = 5 × 0.02×24.05/25
= 2.405/25
=0.0962
CB = 0.096moldm-³
(1biii)
From the balanced equation
5 moles of B contains 8 moles of SO²-
4
Hence 5 moles of B = 8moles of H+
0.09moles of B = X
5 × X = 0.09 × 8
X = 0.09 × 8/5 = 0.72/5 = 0.144
=0.144moles/dm-³
= 0.144mol/dm-³
(1biv)
m(SO4²-)=C×M×Vdm³
SO4²-
32+16×14=96gmol
= 0.144×96×250/1000
= 3.456g
Answers loading...
How do I getWAEC GCE 2021. Chemistry 3 answersBEFORE THE EXAM?
. You can get 2020/2020 Exam answers directly from examplaza.com, visit HERE NOW
Frequently Asked Qestions and Answers
HOW TO PASS ANY TEST WITHOUT STUDYING - YouTube
How can I pass a test without studying?
0:193:44Suggested clip 119 secondsHOW TO PASS ANY TEST WITHOUT STUDYING - YouTubeYouTubeStart of suggested clipEnd of suggested clip
7 of the most affordable places to study abroad - Desk International
Which is the cheapest country for study?
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
List of Universities in USA that Accept WASSCE Results | GH Students
Is Waec accepted in USA?
The WAEC examination is open to both private and school candidates. ... Some universities in the USA accepts WAEC results from West African students. So, you need to meet their minimum requirements before you're offered admission into an American university.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
How to Apply for Canada Student Visa in Nigeria - NaijaGoingAbroad
How much will it cost to study in Canada from Nigeria?
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.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
NECO Registration Form 2020/2021 and Latest Exams Updates ...
How much is Neco Nigeria?
To register for NECO examination, candidates are to obtain a draft and pay a non-refundable fee of Twelve Thousand Naira Only (N12,000) paid via bank draft or to school management if internal registration. The payment can be done in any NECO office, banks and Nipost offices nationwide.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
University guide for mature students - Complete University Guide
What is the oldest age you can go to university?
A mature student can be as young as 21 but many are in their late 20s/early 30s or older, and may have left school without the necessary A Levels or equivalent.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
WAEC ONLINE CERTIFICATE REQUEST - ONLINE REQUEST FORM
Can I get my Waec certificate online?
Private Candidates are now required to apply for their certificates online. The certificates will be dispatched to the WAEC Office of their choice for collection. Candidates are also informed that the certificates for private candidates will be printed only on request and should be collected within 48 hours.
WAEC Grading System & Meaning | A, B, C, D, E & F Interpretations
Is e8 a pass mark in Waec?
B3 is B (Very Good), C4 is C (Good), C5 and C6 are (Credit), D7 and E8 are E (Pass) and F9 is F (Fail).
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
WAEC to stop amendment on certificates in 2017 - Punch Newspapers
Does Waec certificate carry date of birth?
WAEC to stop amendment on certificates in 2017. The West African Examinations Council says it will stop amending the date of birth and other entries on the certificate of candidates from January 1, 2017.
FAQ - WAEC Nigeria
How many subjects are required for Waec?
Candidates are required to enter and sit for a minimum of eight (8) and a maximum of nine (9) subjects. (iv) At least one of Physics, Chemistry and Biology. (v) At least one of Literature-in-English, History and Geography.
Candidates are required to enter and sit for a minimum of eight (8) and a maximum of nine (9) subjects. (iv) At least one of Physics, Chemistry and Biology. (v) At least one of Literature-in-English, History and Geography.
Which Is More Easier To Pass Between WAEC, NECO, & NABTEB ...
Is Neco harder than Waec?
NECO seems less difficult compared to WAEC but not also easy to make A's.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
How Much Is WAEC 2020 Form? See Price Of WAEC Registration ...
How much is Waec fees in Nigeria?
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.
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.Jan 6, 2020
List of Universities in Germany that Accept WAEC Results | GH ...
Is Waec accepted in Germany?
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.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
NECO 2020 BECE Registration Form ("Junior WAEC") ? NGScholars
How much is junior Waec fees?
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.
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.Feb 18, 2020
Can I Gain Admission With NECO Result? See answer here ...
Can I gain admission with NECO result?
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.
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.Jul 14, 2019
How To Pass NECO 2020 Exam Or NECO GCE With Straight A's ...
Is NECO easy to pass?
Passing NECO is not difficult, the problem is that many candidates use the wrong method to prepare for NECO and NECO GCE.
Passing NECO is not difficult, the problem is that many candidates use the wrong method to prepare for NECO and NECO GCE.Jan 19, 2020
Is D7 accepted in University of Ghana? - LegonConnect
Do universities accept d7?
Currently, public universities don't accept D7 for core subjects in admission purposes.
Currently, public universities don't accept D7 for core subjects in admission purposes.Feb 10, 2020
WAEC subjects for science students ? Legit.ng
What are Waec compulsory subjects?
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
2020 WAEC GCE Registration Form | Instructions & Guidelines
How much is Waec 2020?
How to Apply for the 2020 WAEC GCE. Candidates arc expected to pay a registration fee of Thirteen Thousand, Nine Hundred and Fifty Naira (N13,950) only, at branches of any of the following banks or any accredited agent and obtain the Registration PIN and Information VCD: Access Bank Plc.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
Does WAEC Repeat Past Questions? Click Here To See Answers ...
Do Waec repeat questions?
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.
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.
9 Creative and Inventive Ways for Students to Cheat in Exams
How can I cheat in exams?
Follow these incredible guidelines to cheat:Don't bring out secret notes right after the beginning of your exams;Avoid using an eraser because it's impractical and obvious;Write down answers on the turn side of your paper;Add tiny notes to clothes, such as sweater sleeves or baseball hats;More items...
Reasons Why NECO Result is Accepted for Study in Canada ...
Is Neco accepted in Canada?
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.
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.Jul 31, 2019
5 Clever Ways Students Cheat on Online Exams and How to Stop ...
How can I cheat in online test?
When giving exams from remote locations, the candidate has the freedom to make use of multiple monitors to have a friend simultaneously access the exam questions and provide answers. Candidates have been known to use screen sharing and mirroring to cheat in tests.
1) Screen Sharing/Mirroring: When giving exams from remote locations, the candidate has the freedom to make use of multiple monitors to have a friend simultaneously access the exam questions and provide answers. Candidates have been known to use screen sharing and mirroring to cheat in tests.May 5, 2020
West African Senior School Certificate Examination - Wikipedia
What Mark is a1 in Waec?
WAEC grading systemGradesDefinitionInterpretationA1Excellent80% - 100%B2Very good75% - 79%B3Good70% - 74%C4Credit60%- 69%5 more rows
WAEC Grading System & Meaning | A, B, C, D, E & F Interpretations
Is e8 a pass mark in Waec?
B3 is B (Very Good), C4 is C (Good), C5 and C6 are (Credit), D7 and E8 are E (Pass) and F9 is F (Fail).
B3 is B (Very Good), C4 is C (Good), C5 and C6 are (Credit), D7 and E8 are E (Pass) and F9 is F (Fail).Mar 3, 2020
WAEC grading system 2020-2021 ? Legit.ng
Is c6 a good grade?
C6 (50-54%), C5 (55-59%) and C4 (60-64%) are credit grades. B3 (65-69%) is a Good grade. B2 (70-74%) is a Very Good grade. A1 (75-100%) is an Excellent grade.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
How to Pass Math Exams | Evan Edinger - YouTube
How can I pass a math test without studying?
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
How Much Is WAEC 2020 Form? See Price Of WAEC Registration ...
How much is Waec fees in Nigeria?
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.
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.Jan 6, 2020
Is NECO Certificate Accepted Outside Nigeria? (Read Here ...
Is NECO certificate accepted internationally?
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.
waec expo runs is real. WAEC Answers, NECO ANSWERS and GCE answers comes a night before exam or Hours before exam
Is my WAEC Result good enough to Study Abroad Nigerian Students
Can I use Waec to study abroad?
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.