2021 Neco Chemistry Obj & Essay Questions And Answers Expo Runz

Neco 2021 Questions and Answers
Neco 2021 Questions and Answers

Neco Chemistry Answers 2021: Expo, 2021 Neco Chemistry Expo, Neco 2022 Chemistry Questions and Answers, Neco Chemistry 2021, Biology Neco 2021, Best Exam Portal, Physic Answer Neco, Best Exam Portal Neco Chemistry 2021, Neco Chemistry Answers 2021, Chemistry Questions and Answers 2021, 2021 Neco Chemistry Practical Expo, 2021 Neco Chemistry Expo, Neco 2021 Chemistry Questions and Answers, Neco Chemistry 2021, Biology Neco 2021, Best Exam Portal, 2021 Neco Chemistry Answers Expo Runz Pdf.

2021 Neco Chemistry Questions and Answers: If you are a candidate who is in search of Neco Chemistry Questions And Answers then you are on the right website because we try to make sure all our audience passes their exams.

If you need us to help you with more updated information at the right time about the 2021 Neco Chemistry Questions And Answers, kindly subscribe or bookmark our website for us to provide you with it.

Expobite understands how students feel whenever it comes to closing time for an external exam such as Waec, Neco, Jamb, and Post Utme, that is why we make sure any question and answers we are releasing/publishing are always the best option questions and answers you are to see in your exam because we always follow scholars and examiners.

Expobite – 28th, July 2021
Keep Subscribing With ƴ For Your Next
Subject @ Www.ExpoBite.Com To Enjoy Our Service And Get Your Legit Solution Night Before Exam Time.




(i)Enthalpy of combustion can be defined as the amount of heat evolved when one mole of a substance burns in air or oxygen

(ii) Isomerism can be defined as a phenomenon in which organic compounds are having the same molecular formula but different structural formula

NO2 – Acidic oxide
CO – Neutral oxide
Fe2O3 – Basic oxide
Al2O3 – Amphoteric oxide

(i)Nitrous oxide
(ii)Carbon (iv) oxide

(i) Fractional distillation of liquid air

(ii) 2KNO3 —–> 2KNO2(s) + O2(g)

(NH)CO3(s) ——>2NH3(g) + CO2(g) + H2O(g)

(iii) No. of molecules = 4/16 × 6.02 × 10²³
= 1.5 × 10²³


(i)Carbon (iv) oxide


Gay Lussac’s states that when gaese react, they do so in volume which bear a simple whole number ratio to one another and to the volume of their products.

2CO + O2 —-> 2CO2
2 1 2
100cm³ 70cm³ 100cm³

Total volume = 100+70+100 = 270cm³

(i)It is used in the production of other chemical substances
(ii)It is used as a drying or dehydrating agent

(i) ZnCO3 —–> ZnO + CO2

– High temperature
– High pressure

(ii) ZnO + H2SO4 —-> ZnSO4 + H2

– Catalyst
– Surface area

(i) Crystallization method
(ii) By heating the ZnSO4 with an alkali metal carbonate

(i) This is due to the presence of extra electrons not used for bonding graphite
(ii) This is because sodium salts are soluble and double decomposition is used for the production of insoluble salts
(iii) It is an alkali substance ie possesses basic properties

(i)Bitumen coal
(ii)Peat coal

Fractional distillation

(i)Molecules of gases are in constant random motion
(ii)The collision of gases is perfectly elastic
(iii)An increase in temperature leads to an increase in the average kinetic energy of the molecules of gases

(i)They both turn blue litmus paper red
(ii)They both dissolve in water to produce an acid



Activation energy can be defined as the minimum energy required for a reaction to occur.

Catalyst lowers activation energy


(i)Sodium trioxocarbonate (iv)
(ii)Hydrogen gas

(i)It reacts with metals to liberate hydrogen
(ii)It reacts with base to produce salt and water only

(i) 2KI + 2Cl2 —-> 2Kl2 + I2

(ii) 2Zn + Cl2 —–> 2ZnCl


Covalent bond

(i) Butane
(ii) Propene
(iii) Ethanol
(iv) Ethyne

(i) Base has bitter taste
(ii) Base is soapy to touch
(iii) Base turns litmus paper blue

The steps involved are:
(i)Shift conversion
(ii)Removal of carbon (iv) oxide
(iii)Steam reforming

Cracking is the process by which heavier hydrocarbon molecule is splitted into two or more lighter molecules

Thermal cracking

P ion = 1s²2s²2p⁶

Formula of chloride is Pcl2

Reducing agent
This is because it undergoes oxidation by losing electrons

Electron affinity is the energy released when a gaseous atom gains an electron to form a gaseous negative ion.

This is because it has lone pairs of electrons

(i) By adding a catalyst

(ii) FeS(s) + 2HCl(g) —–> FeCl(g) + H2S(s)

Xg = ?
No. of FeCl2 = 127g/mole
No. of FeS= 88g/mole

Mole = Mass/ No. of Mass = 3.2/127 = 0.025mole of FeCl2

By comparison,
1 mole of FeS = 1 mole of FeCl2
X moles of FeS = 0.025 of FeCl2
X = 0.025mole of FeS

Mass = Mole * molar mass
Mass = 0.025*88
Mass = 2.2g of FeS
X = 2.2g


Completed!. We Remain The baddest
Site Ever.
We Remain Your Favourite Site.
Ensure You Subscribe For Your Next
Paper @ Www.ExpoBite.Com
On How To Get Your Live Question And Answer before Exam.
We Remain The No1


Wednesday 28th July 2021

  • Paper Ill & ll: Objective & Essay – Chemistry 10:00am – 1:00pm

2021/2022 NECO Chemistry Answers for Essay Objectives Questions Available Now

Note: use our examination assistance help desk platform only If you have been looking for a real source in other for you to sort yourself out from Neco bondage. And makes A”s & B”s easily…
If you subscribe to these Answers, then you are to get assistance Immediately after your payment is been confirmed…


  1. CARD PIN NUMBER ( separate by a comma if the card is more than one)
  2. Price of the card
  3. The subject you are paying for
  4. Phone number
  5. LINK/WHATSAPP/SMS/ (specify)
Send it to 07062154881
(eg) Chemistry, MTN N500, 2064874584642(500), 0813533xxxx,SMS) to +2347062154881
You will be notified after your payment has been confirmed, and you get assistance immediately for both questions and answers…
Who Fail to Plan, Plan to Fail, It is Better You MEASURE And Cut Once, Than NOT TO MEASURE And Cut Twice. Subscribe earlier To get our 100% correct 2021 Neco Chemistry Answer now………
Success is all yours!
What’s on your mind?


2021 Neco Chemistry Answers Expo Runz Edition, 2021 Neco Chemistry Answers Expo Runz, 2021 Neco Chemistry Practical Expo, 2021 Neco Chemistry Expo, Neco 2019 Chemistry Questions and Answers, Neco Chemistry 2021, Biology Neco 2021, Best Exam Portal, Neco Chemistry Practical 2021 Specimen, Neco 2021 Physic Practical, Neco Practical Specimen Chemistry Html, Neco Chemistry 2021, Practical Biology Neco 2021, Neco Practical Specimen for All Subject 2021

Facebook Comments

Be the first to comment

Leave a Reply

Your email address will not be published.