ALART: Get Professional Graphic Designs for Your Business At an Afforddable Price!!!!!
ALMOST FREE

Ticker

6/recent/ticker-posts
ALART: Get Professional Graphic Designs for Your Business At an Afforddable Price!!!!!
ALMOST FREE

Free Expo: Waec 2017 Chemistry Obj And Theory Questions And Answers


THEORY
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
1aii)
methyl-orange
1b)
i)oxidizing agent
ii)mixed anhydride
1c)
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

2ai)ii The periodic table arranges the elementsby periodic properties, which are recurring trends in physical and chemicalcharacteristics. ... These trends explainthe periodicity observed in the elementalproperties of atomic radius, ionization energy, electron affinity, and electronegativity.
2aii) Electron affinity
Ionization energy
Electronegativity
2aiii) ELECTRON AFFINITY

Electron affinity reflects the ability of an atom to accept an electron. It is the energy change that occurs when an electron is added to a gaseous atom.

Ionization energy:

Ionization energy is the energy required to remove an electron from a gaseous atom or ion. The first or initial ionization energy or Ei of an atom or molecule is the energy required to remove one mole of electrons from one mole of isolated gaseous atoms or ions.

Electronegativity:


Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons.

3ai)
Thermal cracking
3aii)
C4H8
3aiii)
(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
3aiv)
I-normal butene
II -But-2-ene
Ni
3av)
C4H8 +H2 -------> C4H10
250c
3b)
method
- rub the fat on a blank white paper
- pour Sudan (III) dye over the paper
-wash the paper under tap
Observation
- rubbing the fat on the paper produces a translucent color
-pouring sudan (III) will stain the blot red
Conclusion
- fat is present because sudan (III) can stain fat red

================================

5ai) worm the unknown substance with concentrated H2SO4 in a test tube. if trioxonitrate(v) ion's are/is present, some trioxonitrate(v) acid will be condensed as oily drops on the upper part of the tube. On further heating, the acid decomposes yielding brown fums of NO2 gas.

5iia) Sodium chloride is used for:
=preserving food
=glazing pottery

5iib) Sodium trioxocarbonate(iv) is used for:
=standardizing acids in the laboratory
=the manufacture of glass





Incoming searches 
WAEC 2017 Chemistry expo answers 2017/2018 Chemistry Expo answers. WAEC SSCE Chemistry Answers for 2017 Chemistry Answers WAEC FREE Expo Answers Free Chemistry correct Expo 2017 answers Runz WAEC SSCE 2017/2018 Free Chemistry Questions and Answers Expo Waec runs Gce 2017 FREE Chemistry Questions and Answers Expo Now Posted Neco Ssce Free 2017 Chemistry Theory & Obj Questions and answers have been posted 2017 WAEC Gce Chemistry Paper 1 and Paper 2 OBJ AND THEORY ANSWERS NOW AVAILABLE. Neco gce 2017 verified Chemistry OBJ/THEORY/Questions and Answers Here (CHEMISTRY OBJ AND THEORY) waec Gce Chemistry expo,neco gce 2017/2018 Chemistry answers, free Chemistry ans for WAEC , see WAEC expo Chemistry questions for free, correct WAEC Chemistry ans, sure Gce Chemistry answers runz runs expo free real and correct neco ssce 2017 WAEC Gce Chemistry free expo runz runs ans answers online for free see free answers online, 2017 VERIFIED WAEC Free Gce Chemistry Obj and theory Answers have been posted WAEC 2017 Chemistry 2017 WAEC GCE EXAMINATION EXPO/ANSWER RUNZ RUNS OBJECTIVES and ESSAY. REAL 2017 WAEC EXPO Chemistry QUESTIONS & ANSWERS Direct To Phone Number AS Text message, RE: 2017 WAEC SSCE CRS / CRK (Expo) neco 2017 certified WAEC Chemistry questions and answers WAEC SSCE NOV/DEC 2017 WAEC Chemistry THEORY / OBJ QUESTION AND EXPO I need neco Gce free expo site, how can I get the answer for free, WAEC GCE 2017 Chemistry Objective And Theory Question and Answer Now Posted.
2017/2018 WAEC RUNS WAEC EXPO 2017 WAEC RUNS Chemistry

Chemistry Expo runs 2017 answers questions essay obj theory objective,
Waec 2017 Chemistry Expo,
Free WAEC Chemistry Expo Answers question and answer.,
Waec Chemistry answers obj and theory answers,
Waec 2017 Chemistry real answers Expo Runz,
2017/2017 Chemistry Obj and Theory expo runs 2017,
free WAEC Chemistry answer, WAEC, 
Chemistry answer, 100% 2017 WAEC ,
Chemistry free expo/runz, 2017 WAEC, 
free 2017 waec expo , timetable, waec runs and free waec Chemistry expo, waec,expo,answers Chemistry free answer, Chemistry WAEC 2017 expo, waec 2017 expo Chemistry answer, live 2017 WAEC Chemistry answer now available,
how to get 2017 WAEC Chemistry,
OBJECTIVES & ESSAY question and answer,
2017/2017 waec Chemistry OBJECTIVES & ESSAY question and answers.,
Download 2017 WAEC ,
Chemistry OBJECTIVES & ESSAY waec answer..,
WAEC Chemistry expo, WAEC 2017,
Chemistry expo, WAEC ,
Crs / Crk & ESSAY runz/expo, 2017 WAEC Crs / Crk & ESSAY expo now available,
2017 WAEC Chemistry obj and theory answer…,
Correct Real WAEC 2017,
Chemistry OBJECTIVES & ESSAY Prose And,
Objective CORRECT: 2017/2017 WAEC Chemistry WAEC OBJ Essay Questions,
And Answer Expo/Runs.,
2017/2017 WAEC Chemistry Objective,
and Essay EXPO/QUESTIONS/ ANSWERS FREE.,
Free WAEC 2017 Chemistry Objective and Essay questions and answers, 2017,
free WAEC Chemistry Theory Objective,
and Essay obj and essay answers, Chemistry,
Theory Chemistry essay and obj answer, answers
100% 2017,
WAEC Chemistry Theory Objective and Essay essay and objective free expo/runz fluxwap,gidifans,naijashine,gistpluz,examloaded,
solutionclass,wapbase,naijacamp,naijapunch,codedexam,codedclass,9jamember,examfield,exampunch,sociaworldwide,naijaonly,expoloaded,proudlygist,spicegist,naijamod,naijagreen,earboard,loadedexpo,naijagoodies,9jasolutions,examscampus,generalbaze,examalert,expocrew.,
Waec 2017 Chemistry(Essay, Obj) Answers Are Now Available. Follow The Below Procedure To Get The Answers.,
Free Waec 2017 Chemistry Obj And Theory Answers – May/June Free Expo

Post a Comment

1 Comments

Only Reasonable Comments Will Be Left On Our Blog