WAEC GCE 2018/2019 Chemistry Essay and Objective Questions and Answers
Gas > liquid > Solid
Solid > liquid > gas
(I) Magnesium from 0 to +2
(II) Hydrogen changes from 1 to 0
I —> Magnesium is oxidized
II —> Hyfrogen is reduced
(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
It decreases the boiling point as the boiling point of water is proportional to the magnitude of atmosphere pressure.
It dictates the rate of reaction and also optimize the amount of product formed.
C3H7CooH —> Butanoic acid
(CH3)3COH —> Butan-1-ol
Functional groups are responsible for their different chemical behavior or properties so that organic compounds with smaller functional group would behave similarly.
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.
3F2 + 3H2O -> 6HF + O3
Basicity of an acid is the number of replaceable hydrogen ions in the acid.
C = 0.48 H = 0.8 Cl = 1.42
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
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
(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
(i)Eq1- actuation energy for in catalyzed reaction
(ii)Eq2 – actuation energy for catalyzed reaction
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
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
collegesrank.com 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
How to Subscribe For Chemistry Questions and Answers Expo Runz
Per subject cost – N800 (Recharge Voucher of N800 MTN only sent to our official line – 08133139104)
After subscribing to our WAEC GCE Feb/Jan Assistance program, you would be added to our WAEC 2018 WhatsApp Group Chat where you will receive all the questions and answers.
If you wanna Subscribe for this assistance Text and WhatsApp only: 08133139104
Free Chemistry Questions and Answers Available
If you dont have money to Subscribe kindly wait for collegesrank.com to post questions and answers on this very page — https://collegesrank.com/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.
Chemistry Essay and Objective 2018 WAEC GCE, WAEC GCE 2018/2019 January/February examination expo runz whatsApp group chat invitation link, free WAEC GCE 2018/2019 Chemistry Essay and Objective papers for kenya, Cameroon, Seirre Leone, Ghana, now posted on WhatsApp, free expo website for WAEC GCE, 2018/2019 Chemistry Essay and Objectives exam Expo runz posted for free. Complete correct Verified WAEC GCE 2018/2019 Chemistry Essay and Objective answers and questions