Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

As a matter of fact in this post we shall be giving you Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo published for students who is searching for guidelines to pass the upcoming Chemistry examination scheduled for next week. Please read more.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo – Furthermore this post is majorly for students who have not read well in the past few weeks, therefore we have taken our time to reach you all in such a manner that you would not have to stress your self again.

Similarly, the Essay & Objectives Theory NECO Chemistry 2017 answers has been published on this page to assist students who wants to use it to study.

IMPORTANT WARNING: The answers in this post is just for student to refresh their memory and keep them up to date.  Furthermore as a matter of fact this is not presently the 2017 NECO exam answers.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Below are current dates for Neco exam 2017 (As a matter of fact for students who are not updated)

Date for Writing NECO Chemistry Exam 2017
========================================
Chemistry 2 (Essay) Thursday 6th July: 10am – 1pm
Chemistry 1 (Objective) Thursday 6th July: 10am – 1pm
========================================

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Get ESSAY/ THEORY ANSWERS BELOW – Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo ;

2017 NECO Chemistry Questions and Answer Expo.

1. first and foremost – neco chemistry Answer 2017
2. above all -neco 2017 Questions & Answer
3. finally -neco practical specimen for all subject
4. above all -neco chemistry 2017 expo past questions
5. similarly – NECO biology practical 2017

As a matter of fact Neco Answers have been randomly published in this post basically to avoid student copying inside the exam hall.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Question 3
3b)
In other words the oil is stained red. This is a specific test for fats if suden (iii) is added to fats a distinct red colouration is observed

3c)
Given 2502+02+2H20—>2H2SO4
1mole produce 2mole
1.3mole produce 3mole
moles of H2SO4=3mole
molar mass of H2SO4=(1+2)+32+(4*16)
=2+32+64 = 98gmol-^1
mole=mass/molar mass
mass and H2SO4=Mole*molar mass
=3*98 =294g

3di) DH2

Question 4
4ai) Thermal cracking
4aii) C4H8
4aiii)

(I) H H. H
| | |
H-C-C-C=C
| | | |
H H H H
and
(II) H H
| |
H-C-C=C-C-H
| | | |
H H H H

4aiv)
I-normal butene
II -But-2-ene
Ni

4av)
C4H8 +H2 ——-> C4H10
250c.

4b)
method
– rub the fat on a blank white paper
– pour Sudan (III) dye over the paper
-wash the paper under tap.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Observation
First and foremost – rubbing the fat on the paper produces a translucent color
Furthermore -pouring sudan (III) will stain the blot red

Conclusion
Finally – fat is present because sudan (III) can stain fat red.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Question 5
5bi)
C(s) + O2(g) =====> Co2(g)
Co2(g) + C(s) =====> 2Co(g)
Fe2O3(s) + 3Co(g) =====> 2Fe(l) + 3Co2(g)

The limestone present decomposes as follows:
CaCo3(s) =====> CaO(s) + Co2(g)

Which is available to remove silicon(iv) oxide impurity
SiO2(s) + CaO(s) =====> CaSiO3(s),

Question 3
1ai) An acid base indicator is a weak acid or weak base that exhibits a colour change as the concentration of hydrogen (H^+) or hydroxide (H^-) ions changes in an aqueous solution.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

1aii) Methyl-orange

1b)
i) Oxidizing agent
ii) Mixed anhydride.

1ci)
Enthalpy of combustion is the heat evolved when one mole of a substance is completely burns in oxygen gas under standard conditions

1cii)
Enthapy of combustion is always negetive since it involvs a rise in temperature and heat of reactants is greater than the heat of products

1d)
Primary cell is a cell that cannot be re charged while secondary cell is a cell that can be recharged

1dii)
primary cell — daniell cell
secondary cell — lead accumulator

1e)
Mole is the unit of measurement in the International System of Units (SI) for amount of substance. The unit is defined as the amount of a chemical substance which contains as many representative particles, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (12C), the isotope of carbon with relative atomic mass.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

1f)
n= V=40cm^3
c= 0.40moldm^3
n=cv/1000
0.40*40/1000 = 0.016mol

1g)
i) Platinum
ii) Carbon

1h)
i) Hydrogen bonds
ii) Vander waals forces

1i) Water(H2O) and Carbonmonoxide (Co)

1j) 1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

5bii)
Faraday’s first law of electrolysis states that, the mass (m) of an element discharged during an electrolysis is directly proportional to the quantity of electricity (Q) passing through it.

Chemistry Past Obj Answers: No Questions at all
01 – 10 = ACDBCBDBCA,

11 – 10 = DBAADCDBCB,

21 – 20 = DBCBCCDBAD,

31 – 30 = BACBACBCCD,

41 – 50 = BDACABDABD.

Complete NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Expo

Related Post

SIMPLIFIED WAEC GCE MATHEMATICS EXPO ANSWERS &... SIMPLIFIED WAEC GCE MATHEMATICS EXPO ANSWERS & RUNZ SIMPLIFIED WAEC GCE MATHEMATICS EXPO ANSWERS & RUNZ | This post give current answers on wa...
Quick NECO Answers Music Questions 2017 | OBJ and ... Quick NECO Answers Music Questions 2017 | OBJ and Theory Answers Quick NECO Answers Music Questions 2017 | OBJ and Theory Answers Presently on Music,...
2017 NECO INSURANCE QUESTIONS AND ANSWERS EXPO 2017 NECO INSURANCE QUESTIONS AND ANSWERS EXPO 2017 NECO INSURANCE QUESTIONS AND ANSWERS EXPO - NECO Insurance Questions and Answers 2017 | OBJ & ...
COMPLETE NECO COMPUTER SCIENCE 2017/2018 ANSWER COMPLETE NECO COMPUTER SCIENCE 2017/2018 ANSWER | THEORY EXPO COMPLETE NECO COMPUTER SCIENCE 2017/2018 ANSWER | THEORY EXPO As a matter of fact here w...
NOV/DEC NECO GCE PHYSICS PRACTICAL ANSWER AND EXPO... NOV/DEC NECO GCE PHYSICS PRACTICAL ANSWER AND EXPO 2017 2017 NECO Gce Physics Practical Expo | 2017 Neco Gce Physics Practical Questions And Answers...
NECO ARABIC ANSWERS 2017 (OBJ & THEORY) RUNZ/... NECO ARABIC ANSWERS 2017 (OBJ & THEORY) RUNZ/EXPO EXAMS NECO ARABIC ANSWERS 2017 (OBJ & THEORY) RUNZ/EXPO EXAMS Finally Neco answers on ARABI...
SIMPLIFIED NECO ISLAMIC STUDIES ANSWERS & EXP... SIMPLIFIED NECO ISLAMIC STUDIES ANSWERS & EXPO RUNZ 2017/2018 SIMPLIFIED NECO ISLAMIC STUDIES ANSWERS & EXPO RUNZ 2017/2018 FULLY LOADED NECO...
NECO ECONOMICS FREE EXPO 2017 QUESTIONS & ANS... NECO ECONOMICS FREE EXPO 2017 QUESTIONS & ANSWERS NECO ECONOMICS FREE EXPO 2017 QUESTIONS & ANSWERS - Finally the D day has come and you now n...
100% REAL NECO FURTHER MATHS ANSWER (ESSAY EXPO RU... 100% REAL NECO FURTHER MATHS ANSWER (ESSAY EXPO RUNZ) 100% REAL NECO FURTHER MATHS ANSWER (ESSAY EXPO RUNZ) Complete neco further maths runz, further...
VERIFIED NECO EFIK PAST QUESTIONS AND ANSWERS OBJ/... VERIFIED NECO EFIK PAST QUESTIONS AND ANSWERS OBJ/ESSAY EXP RUNZ 2017 VERIFIED NECO EFIK PAST QUESTIONS AND ANSWERS OBJ/ESSAY EXP RUNZ 2017 SIMPLIFIE...
SIMPLIFIED NECO LITERATURE IN ENGLISH DRAMA AND PO... SIMPLIFIED NECO LITERATURE IN ENGLISH DRAMA AND POETRY ANSWERS (OBJ/THEORY EXPO RUNZ) SIMPLIFIED NECO LITERATURE IN ENGLISH DRAMA AND POETRY ANSWERS (...
NECO Home Management OBJ, Essay Questions and Answ... NECO Home Management OBJ, Essay Questions and Answers 2017 NECO Home Management OBJ, Essay Questions and Answers 2017 Presently - Home Management, NE...
COMPLETE NECO METAL WORK ANSWERS | METAL WORK EXPO COMPLETE NECO METAL WORK ANSWERS Above all - COMPLETE NECO METAL WORK ANSWERS - Complete metal work answers, metal work expo, full obj metal work answ...
NECO HAUSA ANSWERS 2017 | NECO HAUSA 100% EXPO RUN... NECO HAUSA ANSWERS 2017 | NECO HAUSA 100% EXPO RUNZ NECO HAUSA ANSWERS 2017 | NECO HAUSA 100% EXPO RUNZ Presently here we have NECO HAUSA ANSWERS 201...
Civic Education & Human Right Questions For W... Civic Education & Human Right Questions For WAEC, NECO, NABTEB, GCE Practice Questions. Civi Education & Human Right Questions For WAEC, NECO,...
100% Neco Basic Electricity Answers 2017 – F... 100% Neco Basic Electricity Answers 2017 100% Neco Basic Electricity Answers 2017 NECO 2017/2018 BASIC ELECTRICITY OBJ & ESSAY EXPO | QUESTIONS A...

Pin It on Pinterest

Share This