Thursday 13th June
Paper III & II: Objective & Essay Government 2hrs 40mins 2:00pm 4:40pm
Government OBJ:
1-10: BECCACEDCB
11-20: CEBDDEABCC
21-30: DBAEEAEDAA
31-40: CACBAEDBAD
41-50: CCECCADCCB
51-60: BAACBDBBAAThis is actually the 2019 neco Chemistry practical 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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Make sure you use your school titre value
For example, if your school uses 23.50
Our own solution centre may use 24.00
Pls don't be confused, just make adjustment from the beginning where you will need to find the *VOLUME. OF ACID USED(CA)*
EXAMPLES FOR 22.50cm³
Volume. Of acid used= 1st + 2nd + 3rd/3
=24.00+24.00+24.00 / 3
= 72/3
=24 molperdm³
VOLUME. OF ACID USE for 25.00
VA= 25.00+25.00+25.00 DIVIDED BY 3
=75/3
===================================
(1)
The volume or pipette used 25.00cm³
In a tabular form
Titrations |rough |1st|2nd|3rd|
Final reading |21.00|41.30|20.40|40.90
Initial reading|0.00|21.00|0.00|20.40
Vol of A used |21.00|20.30|20.40|20.50
(1ai)
Average volume of A = 20.30+20.40+20.50/3
=61.2/3
=20.40cm³
(1aii)
H2X(aq) + 2NaOH(aq)-->Na2X(aq) + 2H2O(l)
(1bi)
Mass conc. of B = 1g/250cm³
= 1g/0.25dm³ = 4g/dm³
Using :
Molar conc. = mass conc./molar mass
= 4/(23+16+1) = 4/40 = 0.1mol/dm³
(1bii)
Using CAVA/CBVB = nA/nB
CA = CBVBnA/VAnB
CA = 0.1×25×1/20.4×2
Concentration of A = 0.06127mol/dm³
1C
(i)it might contain traces of impurities which must be removed before being weighed
(ii)it is hygroscopic which readily absorb moisture from atmosphere
==========================================
NO2
1st line:|test|:Xn +distilled water,|observat
ion|:Xn dissolves in distilled water,|inference|:Xn is a soluble salt
= = = = = = = = = == = = = =
2nd line:|test|:1st portion+NAOH
= = = = = = = = == = = == =
3rd line:|test|:2nd portion+NH3 in drop and in excess,|observation|:deep blue ppt,|inference|
:CU2+
= == = = = = = == == = = = =
4th line:|test|3rd portion+BACL2,|
observation|:white ppt,|inference|
:SO42-,SO32-,CO32-,CL-
= = = = = = === = == = = == =
5th line:|test|:+ dil HCL,|observation|:insoluble in HCL,|Inference|:SO42-
Still the same
(2)
FILL IN THE TABLE:
(2i)
OBSERVATION:
Solution turns blue
INFERENCE:
Copper salt suspected.
(2ii)
OBSERVATION:
Blue gelatinous precipitate
Insoluble in excess NaOH
INFERENCE:
Cu²+ suspected
Cu²+ Confirmed
(2iii)
OBSERVATION:
Blue gelatinous precipitate
Soluble in excess NH³
INFERENCE:
Cu²+ Suspected
Cu²+ Confirmed
(2iv)
OBSERVATION:
White precipitate
INFERENCE:
SO4²- Suspected
(2v)
OBSERVATION:
Precipitate insoluble in excess
INFERENCE:
SO4²- confirmed
==≠=============≠===================
(3ai)
phenolphthalein
(3aii)
I. Pink
ll. Colourless
(3aiii)
(i)To give a sharp change in colour at the end of the acid base reaction
(3aiv)
(i)the burette must be rinsed with the acid or allow it to drain after rinsing with distilled water
(ii)Air bubble must not be allowed in the burette
(3av)
Neutralization reaction
(3bi)
I. Hofmann voltameter.
II. Kipp's apparatus
(3bii)
Because silver nitrate is photosensitive (i.e.sensitive to light) Therefore,if the silver nitrate is left in sunlight or any bright light, it breaks down (hydrolyses) to give black/brown silver oxide and nitric acid.
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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.
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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.
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.
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... is externally organized and graded by the West Africa Examinations Council (WAEC), which clas- sifies candidates who obtain BECE Aggregate 6 to 12 as "distinction" or "good" students, Aggregate 13 to 24 achiev- ers as "average," and Aggregate 25 and above achievers as "weak" students (Asihene, 2009;Dorleku, 2013; ...
The West African Examination Certificate Examination (WASSCE) is an examination that is administered by the West African Examination Council (WAEC). The examination is administered yearly. ... Most universities in Germany accepts WAEC results from West African students.
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.
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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.
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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.
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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.
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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.
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.
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So, if yours is an internal examination, kindly go to your school for collection. For private candidates, you need to go to the nearest WAEC office and make inquiry. Just remember, if it's been more than a year since your certificate was released, you will have to pay a fee to collect your certificate.
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. B3 (65-69%) is a Good grade.
Results which met the Ordinary standard (grades 1-6) were recorded as Pass. ... Grades D and E indicated a lower standard of attainment, but were still judged sufficient to be recorded on the certificate. Grade E or below was ungraded and not recorded on the certificate.
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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.
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... is externally organized and graded by the West Africa Examinations Council (WAEC), which clas- sifies candidates who obtain BECE Aggregate 6 to 12 as "distinction" or "good" students, Aggregate 13 to 24 achiev- ers as "average," and Aggregate 25 and above achievers as "weak" students (Asihene, 2009;Dorleku, 2013; ...
21 isn't too old to start anything. Seriously though, who is going to be able to tell you are two years older. It's a none issue. It's probably a better time to start uni than an 18 year old in my opinion.
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.
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