2017 JAMB Runz : 50 Updated Likely Chemistry Questions for UTME CBT Exams

Jamb Admission and Matriculation Board JAMB

✅HOT CHEMISTRY✅

  1. Which of the following results in the fall of acid rain
    A. oxide of lead
    B. particulate matter
    C. oxides of carbon
    D. gaseous hydrocarbon
  2. If glucose is heated on the concentration
    tetraoxosulphate(iv)acid, it will be dehydrated
    A. carbon
    B. carbon(iv)oxide
    C. ethane
    D. ethanol

3.Which of the following compounds can be
represented by the molecular formula C2 H6O?
A. propanal
B. ethanol
C. methanoic acid
D. glucose

  1. What volume of 0.5mldm 3 H 2 SO4 will exactly neutralize 20cm 3 of 0.1moldm 3 NaOH Solution?
    A. 2.0cm 3
    B. 5.0cm 3
    C. 6.8cm 3
    D. 8.3cm 3
  • NH 3(g) + HCl (s) → NH 4Cl (s)
    The entropy change in the system above is
    A. positive
    B. zero
    C. negative
    D. intermediate

  • Tartaric acid is used industrially to
    A. make baking powder
    B. make fruit juice
    C. remove rust
    D. dry substance

  • When sugar is dissolve in ten, the reaction is
    accomplished by
    A. positive change
    B. negative entropy change
    C. no entropy change
    D. a minimum entropy change

  • The leachate of a certain ash is used in local soap because it contain
    A. sodium chloride and potassium hydroxide
    B. sodium hydroxide
    C. potassium hydroxide
    D. soluble carbonates and hydrogen carbonate

  • Chlorine gas turns damp starch-iodide paper
    A. pink
    B. colourless
    C. red
    D. dark blue

  • Which of the following types of alkanols undergo
    oxidation to produce alkanoic acids.
    I. Primary alkanols
    II. Secondary alkanols
    III. Tertiary alkanols
    A. I, II and III
    B. I and II only
    C. III only
    D. I only

  • In the electrolysis of brine the anode is
    A. platinum
    B. copper
    C. zinc
    D. carbon

  • PCL5(g)= PCL3(g) + Cl2(g)
    In the reaction above, a decrease in pressure will
    A. Decelerate the reaction
    B. Increase yield of Pcl3
    C. Increase the yield of Pcl5
    D. Accurate the reaction

  • According to the kinetic theory an absence in
    temperature causes the kinetic energy of particles to
    A. decrease
    B. increase
    C. remain constant
    D. be zero

  • When stem is passed over red hot carbon the substances produced are
    A. hydrogen and trioxocarbonate (IV) acid
    B. hydrogen, oxygen and carbon (IV) oxide
    C. hydrogen and carbon (ii) oxide
    D. hydrogen and carbon (IV) oxide

  • Alloys are best prepared by
    A. electroplating
    B. Arc-welding
    C. reducing and mixture of their metallic
    D. cooking a molten of the metals

  • What is the volume of energy required to burn
    45cm3 of mixture at S.T.P
    A. 135.0cm 3
    B. 150.0cm 3
    C. 45.0cm 3
    D. 90.0cm 3

  • Rare gases are suitable because they
    A. are monoatomic
    B. form ions easily
    C. have duplet or octet electronic configuration in the
    outermost shells in their atoms
    D. are volatile gases

  • Two equal bulbs, one containing ammonia and the
    other one opened mouth-to mouth to each other at
    temperature the entropy in the mixture of gases is likely to
    A. remain unchanged
    B. increase
    C. decrease
    D. charge

  • what is the pH of 0.00lmoldm 3 solution of sodium
    hydroxide
    A. 14
    B. 13
    C. 12
    D. 11

  • Detergents are manufacture with strength
    hydrocarbon chains is to make them
    A. soluble
    B. biodegradable
    C. cheaper
    D. foamy

  • N 2O 4(g) → 2NO 2(g)
    In the endothermic reaction above, more products formed will
    be favored by
    A. A constant values
    B. an increase in pressure
    C. a decrease pressure
    D. a decrease volume

  • Chlorine consisting of two isotope of mass
    number 35 and 37 in the ratio 3:1 has an atomic mass of
    35.5. Calculate the relative abundance of the isotope of mass
    number 37
    A. 20
    B. 25
    C. 60
    D. 75

  • The fuming of kettles is caused by the presence in
    the water of
    A. calcium tetraoxosulphate (IV)
    B. calcium hydrogentrionocarbonate (IV)
    C. calcium hydroxide
    D. calcium trioxocarbonate (IV)

  • 24.The principal constituent of natural gas is
    A. methane
    B. ethane
    C. propane
    D. Butane

    1. One note of a hydrocarbon 36g of carbon and its
      density is 20. The structure of hydrocarbon is (organic
      chemical)
      A. CH3C = CH
      B. CH3CH = CH2
      C. CH3CH2C = CH
      D. CH33CH2CH3

    2. A difference between chemical and physical
      change is that in a chemical change
      A. oxygen is consumed
      B. heat is supplied
      C. the reversible process occurs
      D. a new substance is formed

    3. In the electrolysis of CuSo 4(g) using platinum
      electrode the reaction at the anode is
      A. 4H+ 4e – 2H 2
      B. 4OH – – 4e = 2H 2O + O 2
      C. 2OH – 2e – = 2OH
      D. 2OH – + 2OH = 2H 2O + O 2

    4. 5 block elements of the periodic table one made
      up of
      A. groups 1, 2, 3
      B. groups 1, and 2
      C. group 3
      D. group 3 to 7

    5. The oxidation state of oxygen on tetraoxosulphate
      iv acid is
      A. -4
      B. -2
      C. 4
      D. -8
      Ngstudents.com

    6. Which of the following gives a precipitation when
      treated with NaOH Solution?
      A. AlCl3
      B. NH 4 Cl
      C. Na 2CO 3
      D. CH 3COONa

    7. The filter in the cigarette reduce the nicotine
      construct by
      A. burning
      B. absorption
      C. evaporation
      D. absorption

    8. Which of these require crystallization most?
      A. Drug making
      B. Cement making
      C. Paint making
      D. Perfume making

    9. Iron is often galvanized in order to
      A. Make it more malleable
      B. Remove the impurities unit
      C. Protect it against corrosion
      D. Render it passive

    10. In the industrial production of H 2 is removed by
      (solution)
      A. washing under pressure
      B. drying over phosphorus (V) oxide
      C. passing the mixture to the limewater
      D. using ammonical copper (I) chlorine

    11. The gas that is most useful in protecting humans
      against solar marathon is
      A. chlorine
      B. ozone
      C. carbon IV oxide
      D. hydrogen sulphur

    12. Vulcanization involve the removal of
      A. monometer
      B. the single bond
      C. the double bond
      D. a polymer

    13. A small quantity of solid ammonium chloride
      (NH4Cl) texted gently in a test tube, the solid gradually
      disappear produce two gases. Later, a white cloudy deposit
      was absence on the cooler part of the test tube. The
      ammonium chloride is to have undergo
      A. distillation
      B. sublimation
      C. precipitation
      D. evaporation

    14. When salt loses its water of crystallization to the
      atmosphere on exposure, the process is said to be
      A. efflorescence
      B. déliquescence
      C. effervescence
      D. fluorescence

    15. Atomicity of ozone is
      A. 1
      B. 2
      C. 3
      D. 4

    16. Which of the noble gases has the greatest
      ionization energy
      A. He
      B. Xe
      C. Ar
      D. Rr

    17. P1V1 = P2V2 supports ?
      A. Charles’s law
      B. Boyles’s law
      C. Graham’s law
      D. Avogadro’s law

    18. The weakest attractive force that can be observed
      between two molecules is
      A. ionic
      B. covalent
      C. co-ordinate covalent
      D. vander Waals

    19. An elements used in production of matches is
      A. nitrogen
      B. aluminum
      C. copper
      D. sulphur

    20. Cathode rays cause an object placed behind a
      perforated anode to cast a shadow on the screen. This
      observation shows that the rays
      A. are positively charged
      B. are negatively charged
      C. Have mass
      D. travel in straight lines

    21. Flow of current in electrolytes is due to the
      movement of
      A. electrons
      B. Holes and electron
      C. Ions
      D. Charges

    22. A suitable reagent for distinguish between ethanoic
      and ethanol is
      A. bromine water
      B. Fehling’s solution
      C. sodium hydrogen trioxocarbonate (iv)
      D. Ammoniacal silver trioxonitrate(V)

    23. In the discovery of protein, the instrument used is
      A. cathode ray tube
      B. glass tube and discharge tube
      C. discharge tube with terminal cathode
      D. discharge tube with central cathode

    24. Which of the following metals burns with brick red
      A. Pb
      B. Ca
      C. Na
      D. Mg

    25. In the production of soap, concentrated sodium
      chloride solution is added to
      A. increase the solubility of soap
      B. decrease the solubility of the soap
      C. saponify the soap
      D. emulsify the soap

    26. A liquid that will dissolve fat is
      A. hydrochloric acid
      B. calcium hydrochloride
      C. kerosene
      D. water.
      NGSTUDENTS

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