Wednesday 3rd July
CRS-OBJ!This is actually the 2019 neco chemistary 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.
Ammonium chloride ---> sublimation
Ink ---> chromatography
Iron filling ---> magnetic separation
-Example Of physical Change
(i)change of matter
(ii)evaporation of sodium chloride
-Example of chemical change
(i)burning of firewood
(ii)rusting of iron
(i)they are good reducing agent
(ii)they form basic oxide
(iii)they formed electro valent bonding
Aluminum tetraoxosulphate(vi) is prepared by the action of hot concentrated tetraoxosulphate(vi)acid on aluminum oxide
Al2O3(s) + 3H2SO4(aq)---->Al2(SO4)3(aq)+3H2O(i)
Aluminum tetraoxosulphate(vi) is moderately soluble in water
(i)it is denser than air
(ii)it is very poisonous
It turn black due to the formation of black lead (II) sulphide
Water gas contains flammable gases whereas the producer gas contains both flammable and non-flammable gases
(I) Diamond ---> Octahedral in shape
(II) Graphite ---> Hexagonal in shape
(i) For manufacturing of ammonia and fertilizer
(ii) It is used as a refrigerant and also used to shrink metal parts
(iii) It is used in grinding substances that are too tough to grind at normal temperature
Avogadro's law states that equal volumes of all gases under the same temperature and pressure contain the same number of molecules
Given : 2SO2(aq) + O2(g) --> 2SO3(aq)
Volume of oxygen, O2 required = 1/2*7.50dm³
No of moles required = 3.75/22.4moles
No of oxygen molecules required = 0.1674Ã—6.02Ã—10^23
(I) NaCl -----> Valency of chlorine is 1
(II) NaO2 -----> Valency of oxygen is 2
(III) Na3N ------> Valency of Nitrogen is 3
(i)Formation of black soap
(ii)Formation of glycerol
(iii)It helps in the precipitation of large biomolecules such as protein
Because they react with water to form acids
- Reaction with sulphur
S(s) + O2(g) ---> SO2(g)
- Reaction with metals
4Na(s) + O2(g) ----> 2NaO(s)
Ion is any atom or group of atoms which possess an electric charge
ION : H^+, F^-, N^3+
NUMBER OF PROTONS: 1,9,13
NUMBER OF NEUTRONS : 0, 10, 14
NUMBER OF ELECTRONS : 0, 10, 10
Monosaccharide are simple six carbon sugar having the formula C6H12O6 eg glucose and it's isomers are fructose and galactose, both obtainable from fruits and honey
Chemical industry are companies that produce industrial chemicals
- Favourable climatic conditions
- It's nearness to the source of raw materials
- The availability of space to store raw materials
(i) It is aldose and it contains alkanal (-CHO) group
(ii) Brick red precipitate is formed
(iii) Reducing sugar possess a free aldehyde (-CHO) or ketone (-C=O) group while non reducing sugar a free aldehyde or ketone group is lacking
(i) Pollution is the release of unwanted materials into the environment which cause adverse change
(ii) Pollutant is a substance or energy introduced into the environment that has undesired effects or adversely effects the usefulness of a resource
n=0.05mole of CaC2
CaC2+2H2O ---> Can(OH)2+C2H2
0.05mole of CaC2 ----> 0.05mole of C2H2 because the mole ratio are equal
VC2H2=n*Vm = 0.05*22.4
(i)Na2CO3 ----> soluble
(ii)K2CO3 ----> soluble
(iii)ZnCO3 ----> insoluble
(iv)(NH4)2CO3 ----> soluble
Sublimation is the process whereby a solid changes state directly to the gaseous state without passing through the liquid state upon heating
Iodine and Ammonium chloride
(i) He may have conducted the experiment in a partial vacuum
(ii) Addition of impurities like salt
(iii) T°K = 78 +273 = 351K
(i)presence of moisture
(ii)presence of oxygen
4Al(NO3)3(s) ------> 2Al2O3(s) +3O2(q) + 12NO2(q)
(i)sols and gels
Using CAVA/CBVB =nA/nB
0.122*20.50/CB * 25.00 = 2/1
CB = 0.05002moles/dm^3
Gram conc = molar conc * molar mass
Molar mass of hydrated salt = 6.203 * 1/0.05002
106 + (18x)= 124
18x = 124 - 106
18x = 18
x = 18/18 = 1
SaH was NaCO3. H2O
(i)the metal is potassium
(ii) period 4
(iv) 2k(s) + 2H2O ----> 2KOH(aq) + H2(q)
Standard electrode potential is the potential difference between an element and a solution of its ions under standard condition
I. Oxidation takes place at hydrogen electrode
H2(q) -----> 2H^+(aq) + 2e^-
II. Reduction takes place at copper electrode
CU²+(aq) + 2e ------> CU(s)
CU(s) + 2H^+
(i) It can not be separated by physical means
(ii) The composition is fixed
(iv) Can be represented by a chemical formula
-MIXTURE of Fe and s-
(i) It can be separated by physical means
(ii) The composition of a mixture can vary
(iii) Homogeneous or Heterogeneous
(iv) Can not be represented by a chemical formula
6P , 13Q and 15R
(I) Q is metal
(II) R is a non-metal
(IIII)Q and R belong to the same period .
P2 = 410*300/130=946.2
P2 = 946.2mmHg
2CuO(s) + C(s) ----> 2CuO(s) + CO2(g)
H2O(g) + C(s) ----> CO(g) + H2(g)
(I) 20L and 17B
(II) Calcium chloride
(III) Electrovalent combination
(IV) It is used in desiccators as drying agent for all gases except
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. And if you already know this, you definitely would have been surprised when you read the caption since NECO is a Nigerian examination.
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.
You can use WAEC GCE, NECO GCE, NABTEB GCE to gain admission into UNILAG. And any possible combination is acceptable by the university.
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.
There are many ways that test-takers can cheat on an online proctored exam. They may sneak in their cellphones, have hidden cheat sheets, use electronic gadgets such as a digital watch or a Bluetooth earpiece, or have a fake identity, etc.
The General Certificate of Education Examination (GCE) was replaced by the Senior Secondary Certificate Examination (SSCE). ... A body called West African Examination Council (WAEC) conducts both the SSCE and GCE.
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.
Yes, you can use NECO (be it NECO June/July or Nov/Dec) to gain admission into any university of your choice. Generally, all higher institutions accept NECO just like WAEC, GCE and NABTEB. You can as well combine your NECO with another NECO or any other exams type to gain admission.
To cheat on a math test, discreetly use your phone or sneak notes into the room. If you can subtly use your phone during your test, try texting a friend who's good at math to ask them for an answer you're stuck on.
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 researchers found that while 32.1% of respondents admitted to cheating in a face-to-face class, 32.7% admitted to cheating in an online course. ... Another study took another tack in establishing how common cheating in online exams is, as compared to face to face exams.
About 40% of mature students studying at university are over the age of 30, some in their 50s and 60s. ... Ucas says that universities are happy to accept older students as most arrive with high levels of enthusiasm, commitment and additional life experience.
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.
A1: 1 x 4 = 4 B2: 3 x 3.6 = 10.8 C4: 1 x 2.8 = 2.8 Total points: 4 + 10.8 + 2.8 = 17.6 Now, we divide the UTME by 8 i.e 280 ? 8 = 35 So, the aggregate score will be 17.6 + 35 + Post-UTME score.
... 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; ...
Lets go straight to truth and it is that ? checking waec result without scratch card is never possible if your motive is to: check through a computer. check your result via waec result checking website (online) print out a copy of your result slip.
You may not need TOEFL though, if you have ... All UK universities accept WAEC results for their admission. By WAEC here it means, West African Examination Council (SSCE Results) which can be May/June or Nov/Dec sitting or recently the Jan/Feb or Aug/Sept series.
Nearly all Universities in the UK require GCE A level or equivalent for admission into undergraduate degrees. In addition to A levels, you should also have GCSEs which I believe are O level equivalents (also WAEC in West Africa).
A1 and B2 in the WASSCE means Excellent, B3 is B (Very Good), C4 is C (Good), C5 and C6 are D (Credit), D7 and E8 are E (Pass) and F9 is F (Fail).
If you want to apply for 2020/2021 WAEC registration form, note that WAEC 2020 registration form is already out. The form was released in November 2019. Students who wises to apply for this form, are expected to do so as fast as possible.
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.
Throughout the University, grade A means excellent, grade B means very good, and so on. ... For example, grade B is divided into three bands: B1 means a high B, B2 means a medium B, and B3 means a low B.
Minimum age of admissions. The minimum age to study a degree programme at the university is normally at least 17 years old by the 20 September in the year the course begins. There is no upper age limit. The University will continue to review the minimum age requirement in light of recent changes to national legislation ...
Currently, public universities don't accept D7 for core subjects in admission purposes.
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.
Nigerian students wishing to study abroad with WAEC, NECO or GCE can apply for admission at Brandon University. As a Nigerian or Internationa student seeking admission to study abroad at Brandon University with WAEC can use the link below to apply.
Though Economics is a subject that cut across all departments in secondary, Economics is a core subject for commercial students. You can't escape Economics. Many schools may accept D7 or E8 in Mathematics and English for some courses but for Economics, you must have credit?
It means that you have scored 39% or less on your exam. ... 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.
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.