Updated Jamb Chemistry Questions | Repeated Questions On Chemistry for Jamb 2021

Filed in Education by on April 22, 2021 7 Comments

Jamb Chemistry Questions 2021 | Random Repeated Questions for Chemistry

This post provides the version of Jamb Chemistry Questions 2018 which we have provided you with possible past questions and answers repeated in this year’s Chemistry question and answers.

Jamb Chemistry Questions

Jamb Chemistry Questions

There is a need to feed the masses on information on jamb 2020 Chemistry questions and answers and this we have done by providing you with jamb Chemistry questions 2017. There are many other persons in search of jamb past question and answer on literature in English.

The questions set in Chemistry by Jamb are based on the Chemistry jamb syllabus which we also wrote on. Aside from Jamb Chemistry Questions, we also made available jamb CRS questions 2020 in our other article all this is to get you updated on Jamb 2020.

Our Jamb Chemistry questions were gotten with jamb Chemistry answers 2020 and the questions are basically drawn from the jamb past questions and answers 2015.

We know that many Chemistry candidates are searching for jamb past questions and answers on Chemistry and that is why we saw the need to give you updated questions and answers on jamb questions and answers 2020.

Jamb 2020 Chemistry questions and answers

Like we wrote on jamb 2017 biology questions and answers and jamb 2017 chemistry questions, we want you to be updated and informed about the Jamb Questions and answers for Chemistry and here we have made these questions and answers for you. The questions are updated and are sourced from the ongoing Jamb Examination.

We understand that Jamb is too lazy to set fresh questions for different centres across the Globe and what they basically do is to give out questions randomly that is changing the numbers in the questions. For example, Number 1 in centre A Might be Number 10 in centre B. Questions are set randomly and updated into the database of each centre.

A lot of persons have also made demands on jamb english question 2020 we will be writing on it soon but presently, we have Jamb Chemistry Questions and we wrote on jamb questions and answers physics chemistry 2020. Our articles this day focuses basically on Jamb questions, Jamb Chemistry Questions and all other 2020 jamb questions and answers

Most Questions making Jamb Chemistry Questions 2020 are drawn from the jamb past questions Chemistry.

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Jamb Chemistry Questions 2020 | Chemistry Questions and Answers for Jamb

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

  1. 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
  2. Which of the compounds is composed of Al, Si, O and H?
    A. Epson salt
    B. Limestone
    C. Clay
    D. Urea
  3. 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
  4. 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
  5. 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
  6. 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
    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
  7. 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 tent to decrease across each period
  8. 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
  9. Which of the following types of bonding does not involves the formation of new substance?
    A. Metallic
    B. Covalent
    C. Co-ordinate
    D. Electrovalent
  10. 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
  11. 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.
  12. The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.914 nm. The atomic radius of chlorine atom is
    A. 0.097 nm
    B. 0.914 nm
    C. 2.388 nm
    D. 2.388 nm
  13. The noble gas, argon, is used for
    A. electric are welding
    B. welding brass
    C. underwater welding
    D. steal welding
  14. A side effect of soft water is that
    A. it gives offensive taste
    B. excess calcium s precipitate
    C. it attacks lead contained in pipes
    D. it encourages the growth of bacteria
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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

  1. The air pollutant unknown in nature is
    A. NO
    B. CO
    C. HCHO
    D. DDT
  2. 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
  3. Hydration of ions in solution is associated with
    A. absorption of heat
    B. reduction of heat
    C. conduction of heat
    D. liberation of heat
  4. 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
  5. 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
  6. 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
  7. 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
  8. The substance often used for the vulcanization of rubber is
    A. chlorine
    B. hydrogen peroxide
    C. sulphur
    D. tetraoxosulphate (V1) acid
  9. A gas that is not associated with global warming is
    A. CO2
    B. SO3
    C. CH4
    D. H2
  10. 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
  11. 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.
  12. Synthesic gas is a mixture of
    A. CH4 and H2O
    B. CH4 and H2
    C. CO2 and H2
    D. CO and H2
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These are the Updated Jamb Chemistry Questions, you can also get our material on how to score high in Jamb 2018.
Do you have any question on Jamb 2020 feel free to ask at the comment box below?

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Comments (7)

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  1. alohan gift says:

    Please send more repeated chemistry and physis questions to my email.

  2. alohan gift says:

    Please send me repeated chemistry questions

  3. ashi edith says:

    Please send more of physics ,chemistry and biology repeated question

  4. Lere says:

    Need phy, Chem,bio n eng questions and answers

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