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JAMB - Chemistry (2022)

  • 1
    The sub-atomic particles located in the nucleus of an atom are?
    Odpowiedź
    (A)
    neutron and proton
  • 2

     

    The IUPAC nomenclature of the structure is?

    Odpowiedź
    (D)
    2-chloro-2-methylbutane
  • 3

    SO\(_2\) + O\(_2\) → 2SO\(_3\)

    In the reaction above, the most suitable catalyst is?

    Odpowiedź
    (D)
    vanadium(v)oxide
  • 4
    In the preparation of salts, the method employed will depend on the?
    Odpowiedź
    (C)
    stability to heat
  • 5
    The following non-metal form acidic oxides with oxygen except?
    Odpowiedź
    (C)
    carbon
  • 6
    How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?
    Odpowiedź
    (B)
    20
  • 7
    The sulphide that is commonly used in coating electric fluorescent tubes is?
    Odpowiedź
    (C)
    Zinc Sulphide
  • 8
    An organic compound which liberate carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be?
    Odpowiedź
    (D)
    CH\(_3\)COOH
  • 9
    Addition of sodium chloride to water to form a solution would  lead to?
    Odpowiedź
    (D)
    decrease in freezing point and increase the boiling point
  • 10
    A chemical widely used as a fertilizer is?
    Odpowiedź
    (D)
    nitrochalk
  • 11
    On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell
    Odpowiedź
    (A)
    cu\(^{2+}\)
  • 12
    Addition of charcoal to the filter bed of sand during water treatment for township supply is to?
    Odpowiedź
    (C)
    remove odour
  • 13
    Using the metal activity series, the metal that can liberate hydrogen gas from steam is?
    Odpowiedź
    (A)
    iron
  • 14
    An organic compound with fishy smell is likely to have a general formula?
    Odpowiedź
    (C)
    RNH\(_2\)
  • 15

    N\(_2\)O\(_4\) ⇔ 2NO\(_2\)  (Δ = -ve)

    From the reaction above, which of these conditions would produce the highest equilibrium yield for N\(_2\)O\(_4\)?

    Odpowiedź
    (D)
    high temperature and high pressure
  • 16

    Zn + 2HCL → ZnCl\(_2\) + H\(_2\) 

    What happens to zinc in the above reaction?

    Odpowiedź
    (A)
    oxidized
  • 17
    An organic functional group which can likely decolorize ammoniacal silver nitrate is?
    Odpowiedź
    (C)
    alkyne
  • 18
    A colored gas that is known to be poisonous and can readily damage the mucous lining of the lungs is?
    Odpowiedź
    (C)
    chlorine
  • 19
    In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
    Odpowiedź
    (A)
    the anode is a silver rod and the cathode is the spoon
  • 20
    An organic compound which decolorizes bromine water is likely to be?
    Odpowiedź
    (D)
    C\(_2\)H\(_4\)
  • 21
    Crude petroleum is converted to useful products by the process of?
    Odpowiedź
    (B)
    fractional distillation
  • 22
    An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen. Calculate the the empirical formula [C=12, H = 1, O = 16]
    Odpowiedź
    (D)
    C\(_3\)H\(_8\)O
  • 23

    2H\(_2\) + O\(_2\) → 2H\(_2\)O

    From the equation above, calculate the volume of unreacted oxygen gas if a mixture of 50cm\(^3\) of hydroden and 75cm\(^3\) of oxygen are involved

    Odpowiedź
    (B)
    50cm\(^3\)
  • 24
    In which of the following will hydrogen form ionic compound? 
    Odpowiedź
    (B)
    NaH
  • 25
    If the volume of a given mass of a gas at 0ºc is 29.5cm\(^3\). What will be the volume of the gas at 15ºc, given that the pressure remains constant. 
    Odpowiedź
    (D)
    31.1
  • 26

    The reactions below represent neutralization reaction, in which of them is the value of ΔH highest?

     

    Odpowiedź
    (C)
    NaOH + HCL → NaCL + H\(_2\)O
  • 27
    The pollutant usually presents in a city which generates its electricity from coal?
    Odpowiedź
    (D)
    sulphur(iv)oxide
  • 28
    The dehydration of CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)OH will give?
    Odpowiedź
    (D)
    CH\(_3\)CH=CHCH\(_3\)
  • 29
    When heat is absorbed during a chemical reaction, the reaction is said to be
    Odpowiedź
    (D)
    endothermic
  • 30
    Which of the following best represent solid gas mixture?
    Odpowiedź
    (D)
    smoke
  • 31

    H\(^+\) + OH\(^-\) → H\(_2\)O

    The equation above illustrates

    Odpowiedź
    (D)
    neutralization
  • 32
    Electrons enter into orbitals in order of increasing energy as exemplified by?
    Odpowiedź
    (B)
    1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^1\)2pz\(^1\)3s\(^0\)
  • 33
    Wrought iron is obtained by heating cast iron in a furnace with?
    Odpowiedź
    (B)
    haematite
  • 34
    In the extraction of iron, hot air is introduced into the blast furnace through?
    Odpowiedź
    (D)
    tuyeres
  • 35
    How many bonding pair are present in carbon(iv)oxide? 
    Odpowiedź
    (A)
    4