WAEC GCE 2019/2020 Chemistry Essay and Objective Free Questions and Answers

WAEC GCE 2019/2020 Chemistry Essay and Objective Free Questions and Answers January/February series expo Questions and Answers runz runs posted for free now available for free on WhatsApp

WAEC GCE EXPO

We have posted Today’s Chemistry trail WAEC GCE questions and answers for you to revise for this forthcoming WAEC GCE 2019 Chemistry Essay and Objective examination, so do not patronise any website asking for subscription cause we will post all trial questions and answers for all WAEC subjects here on SchoolCollege.NG,

Just comment “I Need WAEC GCE 2019 Chemistry answers” with your phone number or email and answers would be sent to you immediately. After commenting kindly share this post on Facebook and 15 WhatsApp group chat to get the answers 2 days before examination.

WAEC GCE 2019/2020 Chemistry Essay and Objective Free Questions and Answers

1a)
Gas > liquid > Solid
(1aii)
Solid > liquid > gas
(1bi)
PH>7
(1bii)
PH>7
(1ci)
(I) Magnesium from 0 to +2
(II) Hydrogen changes from 1 to 0
(1cii)
I —> Magnesium is oxidized
II —> Hyfrogen is reduced
(1ciii)
HCL
(1di)
(i) Boiling occurs throughout the entire volume while evaporation occurs at the surface
(ii)It involves the formation of bubbles while evaporation does not form bubbles
(1dii)
It decreases the boiling point as the boiling point of water is proportional to the magnitude of atmosphere pressure.
(1e)
It dictates the rate of reaction and also optimize the amount of product formed.
(1f)
C3H7CooH —> Butanoic acid
(CH3)3COH —> Butan-1-ol
(1g)
Functional groups are responsible for their different chemical behavior or properties so that organic compounds with smaller functional group would behave similarly.
(1h)
Solids in liquid:
(i) It depends on the nature of temperature changes or exothermic or endothermic as affect by the temperature of the liquid.
(ii) The surface area of solid is lesser, they dissolves less as compound to gases in the same volume.
(iii) Pressure does not affect the solubility of the solids
Gas in liquid:
(i) It depends on the average kinetic energy as affect by temperature of the liquid.
(ii) The surface area of gases are higher so they dissolve more in a given volume of water.
(iii) The solubility of gases is a direct consequences of pressure changes due to the partial pressure of the gas molecules.
(1i)
3F2 + 3H2O -> 6HF + O3
(1j)
Basicity of an acid is the number of replaceable hydrogen ions in the acid.
============
(2i)
C = 0.48 H = 0.8 Cl = 1.42
H
C = 1 H = 1 Cl = 35.5
C = 0.48/12
H = 0.08/1
Cl = 1.42/35.5
0.04/0.04 , 0.08/0.04 , 0.04/0.04
Therefore CH2CL
The electrical formular = CH2CL
(2aii) The molar mass of the compound is 99
Hence (CH2CL)n = 99
(12 + 2C1) + 35.5)n = 99
12 + 2 + 35.5
(495)n = 99
Therefore n = 2
Hence the molar formula = (CH2CL)2
C2H4CL2
(2b)
(I) it is soluble in water and in other polar solvents.
(II) Nacl(s) when dissolve in water ionized to form Na+ and Cl-
(III) the aqueous solution of Nacl(s) can be use as n electrolyte
(2ci) DRAW THE DIAGRAM
(2cii)
(i)Eq1- actuation energy for in catalyzed reaction
(ii)Eq2 – actuation energy for catalyzed reaction
2di)
Paraffin wax
2dii)
To obtain the fraction the crude oil must undergo fraction distillation. In this process the crude oil is separated into different portion and the paraffin’s wax district in the temperature range of 35°c to 500°c
2diii)
i)ethene
ii)propane
2div)
They can be obtained from the cracking of crude oil. Cracking which is the breaking down of the crude oil into smaller components through the action of heat
Relooad this page after 30 seconds to get more waec chemistry questions and answers, if this page fails to load kindly share this page to whatsapp and facebook using the social share button below this post, so that the answers will load properly
schoolcollege.ng will post Complete Verified and correct Chemistry Essay and Objective questions and answers to help WAEC candidates to get good grades and be admitted into any University of their choice. We assure you of A’s and B’s in all your subjects. Our questions and answers arrive a day before examination, read below on how to Subscribe for this assistance program

READ:  CEEBOOK WAEC Answer | Free WAEC Expo 2019/2020 | Exam Test Questions

How to get Free Chemistry Questions and Answers Expo Runz

After sharing this our post on Facebook and 15 WhatsApp group using our social share button below this post, you would be added to our WAEC 2018 WhatsApp Group Chat where you will receive all the questions and answers 2 days before examination. We ask you to share our post to make sure you are not a robot…

Free Chemistry Questions and Answers Available

If you don’t have money to Subscribe kindly wait for schoolcollege.ng to post questions and answers on this very page — https://schoolcollege.ng/waec-gce-free-answers/ if answers fail to appear, you then use the WhatsApp, Facebook and Twitter share button to share this page on Facebook whatsapp and Twitter for the Chemistry Essay and Objective expo questions and answers to appear here.

Chinonso Ibeh
About Chinonso Ibeh 3397 Articles
I'm the founder of schoolcollege.ng Nigerian educational resourceful digital content website that ignite students curiosity and inspire educators to reimagine learning as a solid ground, with improving student achievement.

6 Comments

Leave a Reply

Your email address will not be published.


*