What Jamb Sets In Chemistry|What to read for jamb chemistry 2021?

 What Jamb Sets In Chemistry|What you should read for jamb chemistry 2021?

How does Jamb set chemistry questions? 

Jamb sets chemistry questions from their question bank, I don't think there are any new questions. 

You need to relax, Chemistry isn't difficult. 

 

jamb sets in chemistry

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How many questions in Jamb chemistry? 

There will be 40 questions in Jamb Chemistry 

What should I read for Jamb Chemistry? 


Francium: this chemicals element has an Atomic number of 87 and a symbol of French and it life span is just 22 minutes. . When going through jamb questions and answers I have seen this question pop up repeated times


DIAMOND: this is recognized as one of the most hardest substance/ carbon. I will like you to go through your text books and perhaps study everything about diamond


Hydrogenation: this word simply means to treat with hydrogen. Hydrogenation is usually use to deplete most organic compound.

Please note that when you Hydrogenate Alkynes you will get Alkanes


Do you know that the law of Definite Proportion and Constant Composition are the same? 


Should in case you don’t know please read this law and how they relate together.


Atomic number: I will advise you to study the periodic table carefully, if possible cram it because i have seen hundreds of questions that centered much on this area.


Electrons :study everything that has to do with electrons. Remember that electrons revolves around the atom.


Cantenation: try to understand what the term Cantenation is, note where they mostly occur.


Identify those elements that combine with carbon to form compound. I will list some here, please it’s your responsibility to read deeper in this areas.


Hydrogen

Oxygen

Chlorine

Nitrogen

Bromine

Phosphorus


TRY to understand why Pure substances have boiling and melting point


Some other things jamb do set in 2021/2022 chemistry


Jamb exam board are also known to ask questions on radioactive material. But example of radioactive material are:


Uranium,

Thorium

Polonium.

Viscosity: this means internal friction in fluid

When you Dissolves Calcium in water you get CaO.


Read more about the invention of Cathode ray tube whose idea was what gave birth to what we know as television.


Oxy-acetylene flame is mostly used in welding or joining two metals


Find out more information about R.A Millikan he stated that charge of an electron to be –1.60×10-19C (I have seen this question like 15 times in past jamb chemistry questions)


What jamb might set in 2020/2021 chemistry| Organic Chemistry 


Note the form in which Aliphatic Hydrocarbons can exist.. Let me help you here they are:


Cyclic,

Acyclic

or Alicyclic.

Dmitri T. Mendeleev:study how he contributed to the development of the periodic table


CONGENERS: please understand what this term means and examples ( element in the same group)


They might ask you “what is the lightest gas?” Just have it in mind that it is Free Hydrogen (H2)


Understand the concept on how water boil (saturated vapor pressure = atmospheric pressure)


List factors affecting the boiling point ( study this point very well) let me help you to list them


volatility,

polarity

impurity.

Always understand that nuclear energy comes from nuclear fusion


And also understand that the sun energy is as a result of nuclear fusion


Another name for transmutation is still the same as Radioactivity


Understand that Florin is one of the most reactive non metal


Always have it in mind that nucleus is positive


Study about natural and artificial radioactive.


Do you know that zero is the lowest oxidation state of Iron? Please have this at the back of your mind


Read about the history of radioactive and who suggested the name (Marie Curie) and who discovered it (Antoine Becquerel)


Please understand that Quantum Numbers don’t point to atoms but ELECTRONS… (jamb uses this question to confuse candidates)


Top 40 questions that Jamb sets in Chemistry every year 

Commonly repeated Jamb Chemistry Questions (1, 2 or even more might come out for you) 

1 :- the element with an electron configuration 1s2 2s2 2p6 3s23p64s2

ANSWER =

a noble gas

2 :- ethanoic acid is monobasic because its

ANSWER =

has one replaceable hydrogen molecule

3 :- the type of bond in nitrogen molecule is

ANSWER =

covalent


Read : how to predict Jamb questions 

4 :- in the hydrogenation of benzene, the catalyst used is

ANSWER =

Ni

5 :- the acid found in sour milk is

ANSWER =

lactic acid

6 :- transition metals with higher oxidation state will form oxides that are

ANSWER =

basic

7 :- the iupac nomenclature of the compound above is

ANSWER =

pent-2-yne

8 :- in the diagram above X is

ANSWER =

H2

9 :- if 200cm3 of oxygen passes through a porous plug in 100sec.find the time taken for the same volume of hydrogen to pass through the same porous plug

ANSWER =

25

10 :- the method used in purifying sugar is

ANSWER =

crystallization

11 :- the activation energy of a chemical reaction can be lowered by

ANSWER =

the addition of a catalyst

12 :- in the equation above X is

ANSWER =

CH3COOCH2CH3

13 :- a solubility curve is a plot of the solubility of solute against

ANSWER =

TEMPERATURE

14 :- the method that is not economical for the removal of hardness in water for town supply is

ANSWER =

permutit

15 :- in the electrolytic extraction of sodium from fused sodium chloride calcium chloride is usually added to

ANSWER =

remove impurities

16 :- grades of petrol having octane number nearer zero will cause a motor car engine to ‘

ANSWER =

17 :- nickel is plated on steel to

ANSWER =

increase its strength

18 :- the solubility in mol/dm3 of 20.2g of potassium trioxonitrate(V)dissolved in 100g of water at room temperature is

ANSWER =

2

19 :- what is the atomic number of an element having 127 neutrons and 82 electrons

ANSWER =

82

20 :- 28.80CM3 OF NITROGEN AT 15c is cooled to 0C.its volume at constant pressure is

ANSWER =

27.3

21 :- what physical property of alkane decreases as the number of carbon atoms increases

ANSWER =

solubility

22 :- which of the following substances are made by polymeriztion

ANSWER =

nylon and artificial rubber

23 :- which of the following compounds is unsaturated

ANSWER =

methylbenzene

24 :- a compound contains 31.9% potassium 28.93 chlorine and the remaining oxygen.what is the chemical formula of the compound?\

ANSWER =

KClO2

25 :- the use of neon light in aerodome beacons is due to its

ANSWER =

COLOUR

26 :- K4Fe(CN)6 is an example of a

ANSWER =

complex

27 :- if T change in s is small relative to change in H at room temperature the value of change in G will be

ANSWER =

positive

28 :- the solibility of alkanols in water is due to the presence of

ANSWER =

hydroxyl group

29 :- when lubricating oil is redistilled,it yields

ANSWER =

petroleum jelly

30 :- the iupac nomenclature of K2Cr2O7 SI

ANSWER =

potassium heptaoxochromate(VI)

31 :- ALKYNES BURN WITH SMOKY LUMINOUS FLAME DUE TO HIGH

ANSWER =

carbon content

32 :- ozone is known for its ability to

ANSWER =

attack the respiratory tract of organisms

33 :- which of the following properties is peculiar to graphite?

ANSWER =

it is unreactive

34 :- calculate the amount in moles of zinc that will be deposited by passing 10 faradays of elctricity through a solution of zinc salt

ANSWER =

5

35 :- the air pollutant that dissolves in water due to produce acid rain is

ANSWER =

O3

36 :- the property peculiar to pure oxygen is that it

ANSWER =

is lighter than air

37 :- the principal property that determines the method of an extraction of a metal from its oe is its

ANSWER =

position in the activity series

38 :- when water is added to calcium oxide,it forms

ANSWER =

calcium hydroxide

 

 

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39 :- in the reaction above, the reverse reaction can be favored by

ANSWER =

decreases the temperature

40 :- an element with electron configuration 1s2 2s2 2p6 3s2 3p4 belongs to the

ANSWER =

p-block


Read : how to prepare for jamb 2021 

           How answer jamb questions properly 

           How to get above 250 in Jamb 


Top Topics to read for Jamb Chemistry 2021

Separating techniques

How to determine empirical formula

Balancing of equation

Acid, Base, and Salt (Physical and Chemical properties, Neutralization rxn)

PH Scale

Isotopes

Electronic configuration

Gas Law

Redox reaction

Rate of chemical reaction (Le Chatelier’s principle)

Carbon and its compound

Hydrogen and its compound

Nitrogen and its compound

Sulphur and its compound

Allotropes

Aromatic and Aliphatic Hydrocarbon (Alkane, Alkene, Akyne, Benzene)

Isomerism

Alkanol

Alkanoic

Esterification

Hardness of water

Saponification


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