JAMB Chemistry Questions Check Randomly Repeated Questions

Filed in Education by on June 2, 2021

JAMB Chemistry Questions – Are you or someone you know preparing to write Chemistry in Joint Admissions and Matriculation Board, JAMB ? If yes, this post will enable you to ace the exam. Pay attention to the questions and answers on this post as you stay glued and read on.

I will be showing you past JAMB Commerce random repeated questions for free. You will understand how JAMB Commerce questions are set and many other examination details.

The Joint Admissions and Matriculations Board (JAMB) is a Nigerian entrance examination board for tertiary-level institutions. The board conducts entrance examinations for prospective undergraduates into Nigerian universities.

Repeated JAMB Chemistry Questions

Below are some randomly repeated questions seen when writing Chemistry in JAMB.

Objective Questions

1. A mixture of iodine and sulphur crystals can be separated by treatment with
A. water of filter off sulphur
B. carbon (1V) sulphide to filter off iodine
C. ethanoic acid to filter off sulphur
D. methanol to filter off iodine

2. Sieving is a technique used to separate mixtures containing solid particles of
A. small sizes
B. large sizes
C. different sizes
D. the same size

3. Which of the compounds is composed of Al, Si, O and H?
A. Epson salt
B. Limestone
C. Clay
D. Urea

4. 50cm3 of carbon (11) oxide was exploded with 150cm3 of air containing 20% oxygen by volume, which of the reactants was in excess?
A. Carbon (11) oxide
B. Carbon (1V) oxide
C. Oxygen
D. Nitrogen

5. How many moles of HCl will be required to react with potassium heptaoxodichromate (V1) to produce 3 moles of chlorine?
A. 14
B. 12
C. 11
D. 10

6. The ratio of the initial to the final pressure of a given mass of gas is 1:1:5. Calculate the final volume of the gas if the initial volume was 300cm3 at the same temperature.
A. 120 cm3
B. 200 cm3
C. 450 cm3
D. 750 cm3

7. The partial pressure of oxygen in a sample of air is 452mm Hg and the total pressure is 780mmHg. What is the mole fraction of oxygen?
A. 0.203
B. 0.579
C. 2.030
D. 5.790

More Questions

8. The fundamental difference between the three states of matter is the
A. shape of their particles
B. number of particles in each state
C. shape of the container they occupy
D. degree of movement of their particles

9. Which of the following statements is correct about the periodic table?
A. Element in the same period have the same number of valence electrons
B. The valence electrons of the elements in the same period increase progressively across
the period
C. Elements in the same group have the number of electron shells
D. The non-metallic properties of the elements tend to decrease across each period

10. The electron configuration of 22X2+ ion is
A. ls2 2s2 2p6 3s2 3p6 4s2 3d2
B. ls2 2s2 2p6 3s2 3p6 4s2 3d1
C. ls2 2s2 2p6 3s2 3p6
D. ls2 2s2 2p6 3s2 3p6 4p2

11. Which of the following types of bonding does not involve the formation of a new substance?

A. Metallic
B. Covalent
C. Co-ordinate
D. Electrovalent

12. The knowledge of half-life can be used to
A. create an element
B. detect an element
C. split an element
D. irradiate an element

13. The shape of CO2H2O and CH4 respectively are
A. bent linear and tetrahedral
B. bent tetrahedral and linear
C. linear bent and tetrahedral
D. tetrahedral, linear and bent.

14. The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.914 nm. The atomic radius of the chlorine atom is
A. 0.097 nm
B. 0.914 nm
C. 2.388 nm
D. 2.388 nm

More Questions

15. The noble gas, argon, is used for
A. electric are welding
B. welding brass
C. underwater welding
D. steel welding

16. A side effect of soft water is that
A. it gives an offensive taste
B. excess calciums precipitate
C. it attacks lead contained in pipes
D. it encourages the growth of bacteria

17 Water molecules can be ligands especially when they are bonded to.
A. alkaline earth metals
B. alkali metals
C. transition metals
D. group V11 elements

18. The air pollutant unknown in nature is
A. NO
B. CO
C. HCHO
D. DDT

19. 10dm3 of distilled water used to wash 2.0 g of a precipitate of AgCl. If the solubility product of AgCl is 2.0 x10-10 moldm-6, what quantity of silver was lost in the process?
A. 2.029 x10-3  mol dm-3
B. 1.414 x 10-3 mol dm-3
C. 2.029 x 10-5 mol dm-3
D. 1.414 x 10-5 mol dm-3

20. Hydration of ions in solution is associated with
A. absorption of heat
B. reduction of heat
C. conduction of heat
D. liberation of heat

21. In which order are the following salts sensitive to light?
A. Agl ›AgCl ›AgBr
B. AgCl ›Agl ›AgBr
C. AgBr ›AgCl ›AgI
D. AgCl ›AgBr ›AgI

Continue Reading

23. Thee pOH of a solution of 0.25 mol dm-3  of hydrochloric acid is
A. 12.40
B. 13.40
C. 14.40
D. 14.60.

24. For a reaction in equilibrium, the species involved in the equilibrium constant expression are
A. gaseous and solid species
B. liquid and solid species
C. solid and dissolved species
D. gaseous and dissolved species

25. A phenomenon where an element exists in different forms in the same physical state is known as
A. isomerism
B. amorphism
C. allotropy
D. isotropy

26. The substance often used for the vulcanization of rubber is
A. chlorine
B. hydrogen peroxide
C. sulphur
D. tetraoxosulphate (V1) acid

27. A gas that is not associated with global warming is
A. CO2
B. SO3
C. CH4
D. H2

28. The refreshing and characteristics taste of soda water and other soft drinks is as a result of the presence in them of
A. carbon(1V)oxide
B. carbon(11) oxide
C. soda
D. glucose

29. A form of carbon used for absorbing poisonous gases and purification of noble gases is
A. wood charcoal’
B. animal charcoal
C. carbon fibres
D. carbon black.

30. Synthetic gas is a mixture of
A. CH4 and H2O
B. CH4 and H2
C. CO2 and H2
D. CO and H2

Click here to download complete Questions.

JAMB Chemistry Questions Today and Answers

1:- the element with an electron configuration 1s2 2s2 2p6 3s23p64s2
CORRECT ANSWER = a noble gas

2:- ethanoic acid is monobasic because its
CORRECT ANSWER = has one replaceable hydrogen molecule

3:- the type of bond in nitrogen molecule is
CORRECT ANSWER = covalent

4:- in the hydrogenation of benzene, the catalyst used is
CORRECT ANSWER = Ni

5:- the acid found in sour milk is
CORRECT ANSWER = lactic acid

6:- transition metals with a higher oxidation state will form oxides that are
CORRECT ANSWER = basic

7:- the IUPAC nomenclature of the compound above is
CORRECT ANSWER = pent-2-yne

8:- in the diagram above X is
CORRECT 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
CORRECT ANSWER = 25

10:- the method used in purifying sugar is
CORRECT ANSWER = crystallization

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

CORRECT ANSWER = the addition of a catalyst

More Questions and Answers

12:- in the equation above X is
CORRECT ANSWER = CH3COOCH2CH3

13:- a solubility curve is a plot of the solubility of a solute against
CORRECT ANSWER = TEMPERATURE

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

15:- in the electrolytic extraction of sodium from fused sodium chloride calcium chloride is usually added to
CORRECT ANSWER = remove impurities

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

17:- nickel is plated on steel to
CORRECT 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
CORRECT ANSWER = 2

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

20:- 28.80CM3 OF NITROGEN AT 15c is cooled to 0C. Its value at constant pressure is
CORRECT ANSWER = 27.3

21:- what physical property of alkane decreases as the number of carbon atoms increases
CORRECT ANSWER = solubility

See More

22:- which of the following substances are made by polymerization
CORRECT ANSWER = nylon and artificial rubber

23:- which of the following compounds is unsaturated
CORRECT ANSWER = ethylbenzene

24:- a compound contains 31.9% potassium 28.93 chlorine and the remaining oxygen. What is the chemical formula of the compound?
CORRECT ANSWER = KClO2

25:- the use of neon light in aerodrome beacons is due to its
CORRECT ANSWER = COLOUR

26:- K4Fe(CN)6 is an example of a
CORRECT ANSWER = complex

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

28:- the solubility of alkanols in water is due to the presence of
CORRECT ANSWER = hydroxyl group

29:- when the lubricating oil is redistilled, it yields
CORRECT ANSWER = petroleum jelly

30:- the IUPAC nomenclature of K2Cr2O7 SI
CORRECT ANSWER = potassium heptaoxochromate(VI)

Continue Reading

31:- ALKYNES BURN WITH SMOKY LUMINOUS FLAME DUE TO HIGH
CORRECT ANSWER = carbon content

32:- ozone is known for its ability to
CORRECT ANSWER = attack the respiratory tract of organisms

33:- which of the following properties is peculiar to graphite?
CORRECT ANSWER = it is unreactive

34:- calculate the amount in moles of zinc that will be deposited by passing 10 faradays of electricity through a solution of zinc salt
CORRECT ANSWER = 5

35:- the air pollutant that dissolves in water due to produce acid rain is
CORRECT ANSWER = O3

36:- the property peculiar to pure oxygen is that it
CORRECT ANSWER = is lighter than air

37:- the principal property that determines the method of extraction of a metal from its ore is its
CORRECT ANSWER = position in the activity series

38:- when water is added to calcium oxide, it forms
CORRECT ANSWER = calcium hydroxide

39:- in the reaction above, the reverse reaction can be favoured by
CORRECT ANSWER = decreases the temperature

40:- an element with electron configuration 1s2 2s2 2p6 3s2 3p4 belongs to the
CORRECT ANSWER = p-block

Frequently Asked Questions (FAQs) and Answers

1. Where can I get JAMB Chemistry Questions?

Ans = it is usually rare to find JAMB questions. Luckily for you, we have it available on our site. Go through this post to see it.

2. Are these the real JAMB expo questions?

Ans =  No! There is no such thing as JAMB Chemistry expo questions. The questions above are randomly repeated past questions.

3. Can I get these questions in PDF format?

Ans = Yes, you can. Contact us and drop your name and email address in the comment box below.

Need us to help you with more updated information at the right time about JAMB Chemistry Questions? If yes, kindly provide us with your phone number and email address in the comment box below.

Feel free to ask any questions pertaining to this guide and also share this information with your friends on Facebook, Twitter, Whatsapp, and Google plus.

CSN Team

Comments (27)

Trackback URL | Comments RSS Feed

  1. kole michael leonard says:

    Pls am writing on THURSDAY 15-.03-2018…my number is 08101072574

  2. Raphael says:

    09038963450 science writing biology, chemistry , physics and English

  3. Abdulafeez says:

    Thanks

  4. IQ UJIH says:

    y are all this browsers laying their cell phone number?

  5. Phyno fino says:

    there is no answer

  6. jethro says:

    plz am wirtin 2day by 9. .00 09093683662

  7. Ghyoneka Gospel says:

    Thursday 08165119072

  8. wisdom says:

    my exam is on thursday 18th by 9:00am my phn no is 08060394937

  9. peace says:

    Please am writing on Thursday by 7am 08168197145

  10. vicany says:

    tomorrow thursday 9am chem, phy, bio , eng 08104041769

  11. harry says:

    I am writing tomorrow phone number 08089394882

  12. Ebenezer says:

    I am writting tomorro wed,9 am

  13. Emmanuel says:

    I am writing on Thursday by 9am 09067078677

  14. Emmanuel says:

    I am writing on Thursday by 9am

  15. chimezie says:

    am writing today by 9am
    num. 09067921387

  16. Abdulsamad Umar says:

    am writing Wednesday 7am [email protected]

  17. am writing on thursday 9:00am chemistry, biology, english, geography

  18. am writing on thursday 9:00am 08147737170

  19. Salome adejumobi says:

    am writing on Wednesday 7:00 am 09035583777

  20. gee says:

    number 09098702356 am writing 1.30 tomorrow thanks

  21. izaak says:

    I am writing on Tuesday nd my phone number is 08083932583

  22. rycho says:

    am writing on tuesday my phone num is 08101216015

  23. Lenz says:

    M writing on tuesday ma phone num is 09061661094

  24. Divine says:

    08139303283

  25. Nenye says:

    my exam is today by 7o’clock: 09029492232

  26. Isaiah says:

    Am very grateful

  27. sunday says:

    09072986212

Hey Hi

Don't miss this opportunity

Enter Your Details