JAMB UTME - Chemistry - 1988 | Green Bridge CBT

Ibeere 1 Ìròyìn

Aluminium is extracted commercially from its ore by?

heating aluminium oxide with coke in a furance

the electrolysis of fused aluminium oxide in cryolite Ìdáhùn tó tọ́

treating cryolite with sodium hydroxide solution under prressure

heating sodium aluminium silicate to a high temperature

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrolysis (JAMB)

Electrolysis

Wo Idahun

Ibeere 2 Ìròyìn

Alkanoates are formed by the reaction of alkanoic acid with?

Alkyl halides

alkanols Ìdáhùn tó tọ́

ethers

sodium

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

Wo Idahun

Ibeere 3 Ìròyìn

Which of the gas laws does the above graph illustrate?

Boyle

Charles Ìdáhùn tó tọ́

Graham

Gay-Lussac

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 4 Ìròyìn

Suitable reagents for the laboratory preparation nitrogen are?

sodium dioxonitrate (III) and ammonium chloride Ìdáhùn tó tọ́

sodium dioxonitrate (V) and ammonium chloride

sodium chloride and ammonium chloride

sodium chloride and ammonium diozonitrate (III)

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 5 Ìròyìn

Given the reactions (i) Fe(s) + X(NO3)2(aq) → Fe(NO3) + X(s) (ii) H2(g) + XO → X + H2O(s); X is likely to be?

copper Ìdáhùn tó tọ́

zinc

calcium

lead

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemical Equilibria (JAMB)

Chemical Equilibria

Wo Idahun

Ibeere 6 Ìròyìn

The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?

nitrogen is less soluble than oxygen Ìdáhùn tó tọ́

oxygen is heavier than nitrogen

nitrogen has a higher partial pressure in air

gases are hydrated in water

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Water (JAMB)

Water

Wo Idahun

Ibeere 7 Ìròyìn

Which of the followingstatements is TRUE?

The dissolution of NaOH(s) in water is endothermic

The heat os solution of NaOH(s) is positive

The NaOH(s) gains heat from the surroundings

The heat of solution of NaOH(s) is negative Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Energy Changes (JAMB)

Energy Changes

Wo Idahun

Ibeere 8 Ìròyìn

Which of the following compounds has the highest boiling point?

CH3CH2CH2CH2HO Ìdáhùn tó tọ́

CH3CH2CH2CHO

CH3CH2CH2CH3

CH3CH2OCH2CH3

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

Wo Idahun

Ibeere 9 Ìròyìn

What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH?

10.0 cm3

20.0 cm3

27.0 cm3

30.0 cm3 Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

Wo Idahun

Ibeere 10 Ìròyìn

An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?

water

moist SO2 Ìdáhùn tó tọ́

acidified KMnO4 and water

water, acidified KMnO4 and oxygen

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Environmental Pollution (JAMB)

Environmental Pollution

Wo Idahun

Ibeere 11 Ìròyìn

Which of the following statements is NOT correct?

The average kinetic energy of a gas is directly proportional to its temperature

At constant tempearture, the volume of a gas increases as the pressure increases Ìdáhùn tó tọ́

The pressure of a gas is inversely proportional to its volume

The temperature of a gas is directly proportional to its volume

The collisions of molecules with each other are inelastic

Awọn alaye Idahun

Increasing the pressure confines the gas molecules to a smaller space, thereby reducing the volume. Reducing the pressure the other way round increases the volume of a gas.

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 12 Ìròyìn

Methylethanoate reacts with ammonia to yield?

mettylamine and ethanol

ethylamine and methanol

methanamide and ethanol

ethanamide and methanol Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Wo Idahun

Ibeere 13 Ìròyìn

2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?

constant composition

conservation of matter

multiple proportions Ìdáhùn tó tọ́

definite proportions

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

Wo Idahun

Ibeere 14 Ìròyìn

What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?

Steam distillation

Destructive distillation Ìdáhùn tó tọ́

Liquefaction

Hydrolysis

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemical Combination (JAMB)

Chemical Combination

Wo Idahun

Ibeere 15 Ìròyìn

In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of

evaporation

recrystallization

sublimation Ìdáhùn tó tọ́

fractional precipitation

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 16 Ìròyìn

The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?

Mg+

K+

CO22- Ìdáhùn tó tọ́

HCO3

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (JAMB)

Kinetic Theory Of Matter And Gas Laws

Acids, Bases And Salts

Wo Idahun

Ibeere 17 Ìròyìn

An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?

average velocity of the molecules

number of collisions between the molecules Ìdáhùn tó tọ́

density of the molecules

free mean path between each molecules and other

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 18 Ìròyìn

The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?

coulombic

ionic

covalent

Van der waals Ìdáhùn tó tọ́

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Ka ìwé ẹ̀kọ́ nípa Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

Wo Idahun

Ibeere 19 Ìròyìn

Which of the following physical properties decreases across the Periodic Table?

Ionization potenial

Electron affinity

Electronegativity

Atomic radius Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Periodic Chemistry (Nigeria Only) (WAEC)

Periodic Chemistry (Nigeria Only)

Wo Idahun

Ibeere 20 Ìròyìn

The four classes of hydrocarbons are?

ethane, ethene, ethyne and benzene

alkanes, alkenes, alkynes and aromatics Ìdáhùn tó tọ́

alkanes, alkenes, alkynes and benzene

methane, ethane , propane and butane

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Ka ìwé ẹ̀kọ́ nípa Periodic Chemistry (Ghana Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Periodic Chemistry (Ghana Only)

Wo Idahun

Ibeere 21 Ìròyìn

Which of the following in aqueous solution is neutral to litmus?

NH4CI

NaCO3

FeCl3

NaCl Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

Wo Idahun

Ibeere 22 Ìròyìn

Crude copper can be purified by the electrolysis of CuSO4(aq) if?

platinum electrodes are used

the crude copper is made the anode of the cell Ìdáhùn tó tọ́

the crude copper is made the cathode of the cell

crude copper electrodes are used

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrolysis (JAMB)

Electrolysis

Wo Idahun

Ibeere 23 Ìròyìn

What are the possible oxidation numbers of an element if its atomic number is 17?

-1 and 7 Ìdáhùn tó tọ́

-1 and 6

-3 and 5

-2 and 6

Awọn alaye Idahun

17 = 2, 8, 7

Wo Idahun

Ibeere 24 Ìròyìn

Which property of a reversible reaction is affected by a catalyst?

Heat content (enthalphy)

Energy of activation Ìdáhùn tó tọ́

Free energy change

Equilibrium position

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Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 25 Ìròyìn

When H2S gas is passed into a solution of iron (III) chloride, the colour changes from yellow to green. This is because?

H(s)S is reduced to S

Fe3+ ions are oxidized by H(s)S

Fe3+ ions are oxidized Fe3+ ions

Fe3+ ions are reduced to Fe2+ ions Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Oxidation And Reduction (JAMB)

Oxidation And Reduction

Wo Idahun

Ibeere 26 Ìròyìn

The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?

M3X4

M4X3 Ìdáhùn tó tọ́

M3X2

Awọn alaye Idahun

M2+ + X-4 = M4X3

Ka ìwé ẹ̀kọ́ nípa Chemical Combination (JAMB)

Chemical Combination

Wo Idahun

Ibeere 27 Ìròyìn

A mixture of starch solution and potassium iodide was placed in a test tube. On adding dilute tetraoxosulphate (lV) acid and then K2Cr2O7 solutions, a blue-black colour was produced. In this reaction, the?

iodide is oxidized

tetraoxosulphate (Vl) acid acts as an oxidizing agent

starch has been oxidized Ìdáhùn tó tọ́

K2Cr2O7 is oxidized

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

Wo Idahun

Ibeere 28 Ìròyìn

Which of the following acts as both a reducing and an oxidizing agent?

SO2 Ìdáhùn tó tọ́

H2S

CO2

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Oxidation And Reduction (JAMB)

Oxidation And Reduction

Wo Idahun

Ibeere 29 Ìròyìn

In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of

evaporation

recrystallization

sublimation Ìdáhùn tó tọ́

fractional precipitation

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Separation Of Mixtures And Purification Of Chemical Substances

Wo Idahun

Ibeere 30 Ìròyìn

One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?(G.M.V = 22.4 dm3 mol-1)

112.0 dm3

67.2 dm3 Ìdáhùn tó tọ́

56.0 dm3

44.8 dm3

Awọn alaye Idahun

C3H8 + 5O2 → 3CO2 + 4H2O
When the mixture is ignited CO2 is collected as product. From the equation 33 moles of CO2 is produced which equals 3 x 2.4 dm3 = 67.2 dm3 at S.T.P

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 31 Ìròyìn

The energy changes accompanying the addition of an electron to a gaseous atom is called?

first ionization energy

second ionization energy

electron affinity Ìdáhùn tó tọ́

electronegativity

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

Wo Idahun

Ibeere 32 Ìròyìn

Carbon (ll) oxide may be collected as shown above because it

is heavier than air

is less dense than air

is insoluble in water Ìdáhùn tó tọ́

burns in oxygen to form carbon (IV) oxide

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemical Equilibria (JAMB)

Chemical Equilibria

Wo Idahun

Ibeere 33 Ìròyìn

The acidic hydrogen in the compound is the hydrogen attached to carbon number

1 Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Ka ìwé ẹ̀kọ́ nípa Structure Of The Atom (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Structure Of The Atom

Wo Idahun

Ibeere 34 Ìròyìn

The IUPAC name for

2-methylbutanoic acid Ìdáhùn tó tọ́

2-methyl-1- hydroxyketone

2-methyl-1-hydroxy aldehyde

2-methylpentanoic acid

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Wo Idahun

Ibeere 35 Ìròyìn

Detergents have the general formula?

R(CH2)nOH

RSO3-Na+ Ìdáhùn tó tọ́

RSO-2Na+

RSO2H

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Wo Idahun

Ibeere 36 Ìròyìn

Which of the following is used in fire extinguishers?

Carbon (ll) oxide

Carbon (lV) oxide Ìdáhùn tó tọ́

Sulphur (lV) oxide

Ammonia

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

Wo Idahun

Ibeere 37 Ìròyìn

Which of the following will produce the greatest increase in the rate of the chemical reaction represented by the equation Na2S2O3(aq) + 2HCl(aq) → 2NaCI(aq) + H2O(I) + SO2(g) + S(g)?

A decrease in temperature and an increase in the concentration of the reactants

An increase in the temperature and a decrease in the cocentration of the reactants

An increase in temperature and an increase in the concentration of the reactants Ìdáhùn tó tọ́

A decrease in the temperature and a decrease in the concentration of the reactants

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

Wo Idahun

Ibeere 38 Ìròyìn

Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution?

Cu2+ + 2e- → Cu(s) Ìdáhùn tó tọ́

2Cl- -2e → Cl2

Cu(s) -2e → Cu2+(aq)

Cu2+(aq) + 2Cl-(aq) → CuCl2(aq)

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Kinetic Theory Of Matter And Gas Laws (JAMB)

Ka ìwé ẹ̀kọ́ nípa Electrolysis (JAMB)

Kinetic Theory Of Matter And Gas Laws

Electrolysis

Wo Idahun

Ibeere 39 Ìròyìn

Chlorine is produced commercially by?

electrolysis of dilute hydrochloric acid

electrolysis of brine Ìdáhùn tó tọ́

neutralization of hydrogen chloride

heating potassium trioxochlorate (V)

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrolysis (JAMB)

Electrolysis

Wo Idahun

Ibeere 40 Ìròyìn

A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?

20 Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

Wo Idahun

Ibeere 41 Ìròyìn

Which of the following substances is a basic salt?

Na2CO3

Mg(OH)CI Ìdáhùn tó tọ́

NaHCO3

KSO4.AI2(SO4)3,24H2O

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

Wo Idahun

Ibeere 42 Ìròyìn

The diagram above shows the reaction path of an exothermic reaction. The heat of reaction is represented by

lll

lV Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Energy Changes (JAMB)

Ka ìwé ẹ̀kọ́ nípa Energy And Energy Changes (WAEC)

Energy Changes

Energy And Energy Changes

Wo Idahun

Ibeere 43 Ìròyìn

Use the graph above to answer this question. The mass of a substance, M, liberated at an electrode during electrolysis is proportional to the quantity of electricity, Q passing through the electrolyte. This is represented graphically by.

A Ìdáhùn tó tọ́