WAEC GCE Chemistry Question and Answer 2022

WAEC GCE Chemistry Question and Answer 2022

ATTENTION :- IF YOU WANT US TO HELP YOU SEND ANSWER FOR THIS EXAM YOU ARE WRITING, YOU MUST PAY NOT FREE.

WAEC GCE 2022 Chemistry Essay and Objective SUBSCRIPTION PRICE LIST

==> Direct SMS: #1000 MTN CARD
Direct SMS MEANS all answers(theory & obj) will come direct to ur phone as sMs.
==> Online PIN: #500 MTN CARD
Online PIN MEANS The Pin to access our answers online via https://lite.zamgist.com.ng will be sent to u at least 4hours before the exam to access our answers
==> WhatsApp: #500 MTN CARD
Whatsapp MEANS The answer will be sent to you on WhatsApp after we confirm your subscription. Add Us In WhatsApp With 08023429251.

CLICK HERE TO GET YOUR ANSWERS BEFORE EXAM

Check the table below for the price break down of the 2022 waec gce chemistry expo 

Send The Following details:-

(i) MTN CARD Pin(s)
(ii) Your Name
(iii) Subject
(iv) Phone number
===> 08023429251 via sms
NOTE:- All SMS Sent To The Above Number Are Attended To, Our Phone Number Might Be Diverted To Avoid Distraction. Always Send Us SMS Of Your Complaint Even When Our Number Is Not Available, Your Message(s) Will Get To Us And We Will Reply You ASAP.
MORE ACCURATE
CHEMISTRY OBJ
01-10: AACBCACCAD
11-20: BAACDBABCA
21-30: DBACAABDDC
31-40: DBACAABACB
41-50: DBBADABDBB
COMPLETED
===================================
(1ai)
Electrolysis is defined as the chemical decomposition of a substance in its molten form or in solution by the passage of electric current.
(1aii)
The concentration of ion
(1b)
The rate of a chemical reaction is the change in concentration over the change in time and is a metric of the speed at which a chemical reactions occurs.
(1c)
The iodide ions are less electronegative than chloride ions and so they are better reducing agents than chloride ions.
(1di)
3Cl + 6NaOH – -> NaClO₃ + 5NaCl + 3H₂O
(1dii)
Oxidation reaction
(1ei)
CₙH₂ₙ₊₁ COOH = 74
12n +2n +1 +12 +16 +15 +1 =74
14n + 46 =74
14n = 28
n = 2
= CₙH₂ₙ₊₁COOH
= C₂H₄₊₁COOH
= C₂H₅COOH
H H OH
| | |
H – C – C – C =O
| |
H H
(1eii)
Propanoic Acid
(1fi)
This is because of its polarity and ability to form hydrogen bonds therefore it dissolves different molecules.
(1fii)
Sulphur dioxide being a strong reducing agent, reduces the purple coloured solution to form a colourless solution.
(1gi)
(1gii)
Methane
(1giii)
Double decomposition
(1hi)
Solution of silver trioxonitrate(v)
(1hii)
Oxidation reaction
(1i)
The first Ionization of Nitrogen is higher than that of Oxygen because of the inner screening effect in the nucleus of Nitrogen conferring higher Ionization energy.
(1j)
3- Methylpropane
(3bi)
Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product.
(3bii)
An ineffective collision is one that does not result in product formation. The colliding molecules, or other particles, do not have appropriate orientation to one another in the collision to lead to a reaction.
(3ci)
The hydrides of the first elements in groups 15 – 17, namely NH3, H2O and HF respectively, show abnormally high values for melting and boiling points. This is due to the ability to form extensive inter-molecular H-bonding.
(3cii)
(i) Stronger hydrogen bonds
(ii) Molecular associations
(3di)
(3dii)
Lead oxide, Nitrogen dioxide and Oxygen.
(3diii)
(i) Yellow
(ii) White
(iii) White
(3iv)
Coke
==================================
THIS IS LAST YEAR 2021 WAEC GCE CHEMISTRY ANSWERS
CHEMISTRY OBJ
01-10: DBDDACABCB
11-20: ABDBACDABB
21-30: BDAAABBCDB
31-40: BDDDCADBBB
41-50: CCAABDCBDB
COMPLETED
===================================
(1a)
Na₂O + H₂O –> 2NaOH
Sodium oxide (Na₂O) is a simple strongly basic oxide. It reacts exothermically with water to form sodium hydroxide.
(1b)
Hygroscopy is the phenomenon whereby a substance can attract and hold water molecules from the environment without going into solution
(1c)
n = mass/molar mass
n = Number of particles/Avogadro’s number
Mass/molar mass = Number of particles/Avogadro’s number
Mass/12 = 1/6.02×10²³
Mass = 12/6.02×10²³
Mass = 1.993 x 10-²³grams
(1d)
CH₃CH = CHCH₃ will exhibit geometric isomerism due to the presence of a double bond and it has two different groups attached to each carbon on the double bond.
(1ei)
Hunds rule of maximum multiplicity states that for a given electron configuration, electrons enters singly first into the subshell before pairing takes place.
(1eii)
1S², 2S², 2P⁴
(1fi)
Decarboxylation reaction
(1fii)
Soda lime
(1g)
Add water to the mixture containing pentane and ethanol. Use a separating funnel to add the water. Ethanol will dissolve while pentane will not dissolve. Then allow the mixture to separate in two layers and open the tap to drain the lower aqueous layer. Distill the water ethanol mixture to get ethanol.
(1h)
The reaction is a redox reaction because oxidation and reduction are occurring simultaneously K₂Cr₂O₇ an oxidizing agent is reduced to KCl and CrCl₃ while HCl on the other hand is oxidized H₂O.
(1i)
Grahams law of diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of its density provided temperature and pressure remain constant.
(1j)
They form complex ions due to their incompletely filled d-orbitals.
===================================

WAEC GCE Chemistry Question and Answer 2022

===================================
(2a)
(i) C17H36
(ii) C17H36
(iii) C2H2
(iv) CH3COOH and C3H7OH
(v) C2H2
(2b)
5.24/2.56 * 120+18x/120
2.56(120+18x) = 120*5.24
46.08x = 307.2 + 628.8
46.08x/46.08 = 936/46.08
x = 20
(2ci)
HF > H2O > CH4 > NH3
(2cii)
Moving from HF to NH3, their pH values increases which leads to decrease in acidity
(2ciii)
H2C = CHCl > CH3CH >H2C-CH
(2civ)
Heating a metallic surface made of zinc releases zinc fumes which is toxic and it can contaminate the food
(2di)
Pressure
(2dii)
This is because as the volume increases, the average kinetic energy is affected which leads to a decrease in pressure.
===================================
(4ai)
This is a type of hard water that can be removed by boiling
(4aii)
Ca²+(aq) + Na2CO3 (aq) –> CuCO3(s) + 2Na+(aq)
(4aiii)
TABULATE
(i)TEST: Sample + conc. H2SO4 + heat
OBSERVATION: Brown fumes of NO2 evolved
(ii)TEST: Sample + copper + Conc. H2SO4 and
OBSERVATION: Reddish brown fume of NO2
(4bi)
(i) It is used as ingredient in antacid
(ii) It is used as reducing agent
(iii) It is used as food supplement to build string bones
(4bii)
(i) Coal tar
(ii) Coal gas
(4biii)
These are chemical that are produced in a little quantity in the industry
(4ci)
(i)In an unlimited supply of air, Carbon (iv) oxide is formed (CO2)
(ii) in a limited supply of air , Carbon(ii) oxide is formed
(4cii)
C(s) + 02(g) —> CO2(g)
===================================

WAEC GCE Chemistry Question and Answer 2022

===================================
(5a)
3H₂(g) + N₂(g) <—> 2NH₃(g) -∆H
(i) Decreasing the temperature will favour the forward reaction and give a high yield of ammonia
(ii) Increasing the pressure will also favour the forward reaction and give a high yield at ammonia
(5bi)
Bauxite is preferred because other sources contain high Silicon content
(5bii)
(i) Iron(iii)oxide
(ii) trioxosilicates(iv)
(5biii)
NaOH is used to purify the ore
(5biv)
Aluminum is very reactive and cannot be easily reduced from its oxide
(5ci)
Water gas is prepared by passing steam over white hot coke at 1000°c
C(s) + H₃O(g) – -> Co(g) + H₂(g)
(5cii)
Because of the acidic character of aqueous Fe³⁺ ion, Iron(iii) hydroxide will be formed instead of Iron(iii) carbonate due to the displacement at CO₂
(5di)
Sodium darts about and melts into a silvery ball
(5dii)
2Na(s) + 2H₂O(l) —> 2NaOH(aq) + H₂(g)
(5diii)
3.0g of sodium produces 3.0/23 moles
Number of moles of gas produce
= 1/2 x 3/23
= 3/46moles
Volume of gas at S.t.p produced
= 22.4 x 3/46 dm³
= 1.46dm³
===================================
ATTENTION :- IF YOU WANT US TO HELP YOU SEND ANSWER FOR THIS EXAM YOU ARE WRITING, YOU MUST PAY NOT FREE.

WAEC GCE 2022 Chemistry Essay and Objective SUBSCRIPTION PRICE LIST

==> Direct SMS: #1000 MTN CARD
Direct SMS MEANS all answers(theory & obj) will come direct to ur phone as sMs.
==> Online PIN: #500 MTN CARD
Online PIN MEANS The Pin to access our answers online via https://lite.zamgist.com.ng will be sent to u at least 4hours before the exam to access our answers
==> WhatsApp: #500 MTN CARD
Whatsapp MEANS The answer will be sent to you on WhatsApp after we confirm your subscription. Add Us In WhatsApp With 08023429251.

Check the table below for the price break down of the 2021 waec gce chemistry expo 

Send The Following details:-

(i) MTN CARD Pin(s)
(ii) Your Name
(iii) Subject
(iv) Phone number
===> 08023429251 via sms
NOTE:- All SMS Sent To The Above Number Are Attended To, Our Phone Number Might Be Diverted To Avoid Distraction. Always Send Us SMS Of Your Complaint Even When Our Number Is Not Available, Your Message(s) Will Get To Us And We Will Reply You ASAP.

Tags : 2022/2023 Waec gce chemistry theory and obj Expo Questions and Answers, 2022/2023 Waec gce chemistry theory and obj Questions And Answers Expo, 2022/2023 waec Real/Confirmed Waec gce chemistry theory and obj Essay/Obj Expo/Runz Questions/Answers, 2022/2023 WAEC GCE Ssce General Chemistry theory and obj Expo, 2022/2023 Waec gce chemistry theory and obj Runz Questions and Answers, General Chemistry theory and obj answer Waec gce 2022 chemistry theory and obj answer 2022, Confirmed Waec gce 2022 chemistry obj and theory answer, Correct Waec gce 2022 chemistry obj and theory answer, correct Waec gce chemistry theory and obj answer 2022, free waec 2022 answer General Chemistry theory and obj, Free Waec gce 2022 chemistry obj and theory expo, Makeitonce Waec gce 2022 chemistry obj and theory answer, Naijaray Waec gce 2022 chemistry obj and theory answer, Waec gce 2022 chemistry theory and obj ans, Waec gce 2022 chemistry theory and obj Answer, Waec gce 2022 chemistry theory and obj Answer– May/June Expo, Waec gce 2022 chemistry theory and obj expo, Waec gce 2022 chemistry theory and obj Expo Answer, Waec gce 2022 chemistry theory and obj Expo Answers, Waec gce 2022 chemistry theory and obj solution, Waec gce 2022 chemistry obj and theory answer, Waec gce 2022 chemistry obj and theory expo, Waec gce 2022 chemistry obj and theory solution, waec 2022/2023 General Chemistry theory and obj Questions and Answers Runz/Expo, Waec gce chemistry theory and obj 2022, Waec gce chemistry theory and obj answer 2022, Waec gce chemistry theory and obj expo 2022, Waec gce chemistry theory and obj question 2022., Questions And Answers., Real Waec gce 2022 chemistry obj and theory answer, Verified 2022/2023 Waec gce chemistry theory and obj Questions/Answers Expo/Runz, verified Waec gce chemistry theory and obj answer 2022, Verified/sure 2022/2023 waec Ssce Nov/Dece General Chemistry theory and obj Question And Answers Expo/Runz,WAEC GCE ssce 2022 General Chemistry Theory expo answers, Ssce 2022 General Chemistry Expo answers now available, June/July General Chemistry Answers for 2022, General Chemistry Questions WAEC GCE Ssce Expo Answers Here, Free wassce General Chemistry Theory objective, theory & theory correct Expo 2022 answers Runz WAEC GCE General Chemistry Theory, WAEC GCE Ssce 2022 Free General Chemistry Theory theory, Theory Questions and Answers Expo for WAEC GCE General Chemistry Theory Paper 1 and Paper 2 Theory Questions and Answers Expo Now Posted, Free General Chemistry Theory objective ans for internal ssce, see WAEC GCE ssce expo General Chemistry , theory questions for free, expotab correct wassce General Chemistry ans, sure WAEC GCE ssce General Chemistry Theory objective answers runz runs expo free real and correct WAEC GCE ssce 2022 June/July General Chemistry Theory free expo runz runs ans answers online for free see free answers online, General Chemistry WAEC GCE question and answer, 2022/2022 General Chemistry expo, where can i get free WAEC GCE agric answer or question, show me free expo website for WAEC GCE agric answer 2022 runz, 2022 Verified WAEC GCE Free Ssce General Chemistry Answers have been posted REAL WAEC GCE SSCE General Chemistry Theory QUESTIONS & ANSWERS Direct To Phone Number AS Text message, bekeking 2022 WASSCE General Chemistry Theory (Expo) WAEC GCE 2022 examsub runs General Chemistry Theory questions and answers WAEC GCE SSCE June/July 2022 General Chemistry / ESSAY / OBJ QUESTION AND EXPO I need WAEC GCE ssce free expo site, how can I get WAEC GCE General Chemistry Theory answer for free, WAEC GCE 2022 General Chemistry Theory theory, Objective And Theory Question and Answer Now Posted, Real 2022/2022 June/July wassce WAEC GCE General Chemistry Theory objective, theory and theory 100% correct expo questions and answers runz chokes runs, verified 2022 WAEC GCE General Chemistry , theory and obj eduwapaz WAEC GCE General Chemistry Theory expo website, WAEC GCE ssce General Chemistry Theory live cheats, legitsource sure WAEC GCE General Chemistry ANSWER 2022 JUNE/JULY 2022 General Chemistry Theory original objective, theory and theory questions and answer now available here, 100% examkey WAEC GCE ssce General Chemistry Theory expo, 2022 wassce General Chemistry Theory obj, theory and theory runz now posted, correct WAEC GCE ssce General Chemistry Theory objective, theory (theory) answer now ready, free 2022 wassce General Chemistry Theory obj, theory and theory best expo site WAEC GCE ssce General Chemistry Theory questions and answers, password for certified WAEC GCE ssce General Chemistry Theory theory theory obj expo, how to get/ where to get wassce General Chemistry, Runsloaded WAEC GCE General Chemistry Theory, 042tvseries WAEC GCE 2022 General Chemistry theory, expolegit WAEC GCE General Chemistry theory answer, WAEC GCE2022 legitexpo WAEC GCE General Chemistry theory answer, wakagist WAEC GCE General Chemistry theory answer 2022, wakagist WAEC GCE 2022 General Chemistry theory answer, earboard General Chemistry theory answer, naijaexam WAEC GCE General Chemistry theory answer, theory and objective expo answer direct to my phone as text message, trusted WAEC GCE ssce General Chemistry Theory questions and answer, i need WAEC GCE Ssce June/July General Chemistry Theory theory theory objective obj Expo 2022 answers on whatsapp, gidifans General Chemistry Theory answer, expocoded General Chemistry Theory answer, wakagist General Chemistry Theory answer, codedexam WAEC GCE General Chemistry Theory answer, expobomb General Chemistry Theory answer, legitexpo General Chemistry Theory expo, Runsloaded General Chemistry Theory expo, examgists WAEC GCE General Chemistry Theory expo, WAEC GCE General Chemistry Theory objectives answer, examclass WAEC GCE General Chemistry Theory expo free answer. Undiluted General Chemistry