JAMB UTME - Chemistry - 1988 | Green Bridge CBT

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 Juist antwoord

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Lees lesnotitie op Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Vraag 7 Verslag

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

Steam distillation

Destructive distillation Juist antwoord

Liquefaction

Hydrolysis

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Lees lesnotitie op Chemical Combination (JAMB)

Chemical Combination

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Vraag 8 Verslag

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

lll

lV Juist antwoord

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Lees lesnotitie op Energy Changes (JAMB)

Lees lesnotitie op Energy And Energy Changes (WAEC)

Energy Changes

Energy And Energy Changes

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Vraag 9 Verslag

Which of the following is used in fire extinguishers?

Carbon (ll) oxide

Carbon (lV) oxide Juist antwoord

Sulphur (lV) oxide

Ammonia

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Lees lesnotitie op Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Vraag 10 Verslag

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

-1 and 7 Juist antwoord

-1 and 6

-3 and 5

-2 and 6

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17 = 2, 8, 7

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Vraag 11 Verslag

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 Juist antwoord

the crude copper is made the cathode of the cell

crude copper electrodes are used

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Lees lesnotitie op Electrolysis (JAMB)

Electrolysis

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Vraag 12 Verslag

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

Heat content (enthalphy)

Energy of activation Juist antwoord

Free energy change

Equilibrium position

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Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Vraag 13 Verslag

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 Juist antwoord

acidified KMnO4 and water

water, acidified KMnO4 and oxygen

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Environmental Pollution

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Vraag 14 Verslag

Which of the following substances is a basic salt?

Na2CO3

Mg(OH)CI Juist antwoord

NaHCO3

KSO4.AI2(SO4)3,24H2O

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Lees lesnotitie op Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

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Vraag 15 Verslag

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

1 Juist antwoord

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Lees lesnotitie op Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Lees lesnotitie op Structure Of The Atom (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Structure Of The Atom

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Vraag 16 Verslag

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

Mg+

K+

CO22- Juist antwoord

HCO3

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Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Lees lesnotitie op Acids, Bases And Salts (JAMB)

Kinetic Theory Of Matter And Gas Laws

Acids, Bases And Salts

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Vraag 17 Verslag

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 Juist antwoord

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

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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.

Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Vraag 18 Verslag

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

Ionization potenial

Electron affinity

Electronegativity

Atomic radius Juist antwoord

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Lees lesnotitie op Periodic Chemistry (Nigeria Only) (WAEC)

Periodic Chemistry (Nigeria Only)

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Vraag 19 Verslag

Which of the following compounds has the highest boiling point?

CH3CH2CH2CH2HO Juist antwoord

CH3CH2CH2CHO

CH3CH2CH2CH3

CH3CH2OCH2CH3

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Lees lesnotitie op Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Vraag 20 Verslag

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 Juist antwoord

oxygen is heavier than nitrogen

nitrogen has a higher partial pressure in air

gases are hydrated in water

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Lees lesnotitie op Water (JAMB)

Water

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Vraag 21 Verslag

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 Juist antwoord

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Lees lesnotitie op Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

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Vraag 22 Verslag

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 Juist antwoord

density of the molecules

free mean path between each molecules and other

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Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Vraag 23 Verslag

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 Juist antwoord

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Lees lesnotitie op Energy Changes (JAMB)

Energy Changes

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Vraag 24 Verslag

Alkanoates are formed by the reaction of alkanoic acid with?

Alkyl halides

alkanols Juist antwoord

ethers

sodium

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Lees lesnotitie op Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Vraag 25 Verslag

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

SO2 Juist antwoord

H2S

CO2

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Lees lesnotitie op Oxidation And Reduction (JAMB)

Oxidation And Reduction

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Vraag 26 Verslag

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 Juist antwoord

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Oxidation And Reduction

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Vraag 27 Verslag

Aluminium is extracted commercially from its ore by?

heating aluminium oxide with coke in a furance

the electrolysis of fused aluminium oxide in cryolite Juist antwoord

treating cryolite with sodium hydroxide solution under prressure

heating sodium aluminium silicate to a high temperature

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Electrolysis

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Vraag 28 Verslag

Which of the gas laws does the above graph illustrate?

Boyle

Charles Juist antwoord

Graham

Gay-Lussac

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Kinetic Theory Of Matter And Gas Laws

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Vraag 29 Verslag

The IUPAC name for

2-methylbutanoic acid Juist antwoord

2-methyl-1- hydroxyketone

2-methyl-1-hydroxy aldehyde

2-methylpentanoic acid

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Lees lesnotitie op Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

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Vraag 30 Verslag

The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?

nitrogen (ll) oxide

nitrogen (l) oxide

nitrogen (lV) oxide Juist antwoord

nitrogen

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Lees lesnotitie op Chemical Bonds (Nigeria Only) (WAEC)

Chemical Bonds (Nigeria Only)

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Vraag 31 Verslag

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

evaporation

recrystallization

sublimation Juist antwoord

fractional precipitation

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Lees lesnotitie op Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Separation Of Mixtures And Purification Of Chemical Substances

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Vraag 32 Verslag

Chlorine is produced commercially by?

electrolysis of dilute hydrochloric acid

electrolysis of brine Juist antwoord

neutralization of hydrogen chloride

heating potassium trioxochlorate (V)

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Lees lesnotitie op Electrolysis (JAMB)

Electrolysis

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Vraag 33 Verslag

Methylethanoate reacts with ammonia to yield?

mettylamine and ethanol

ethylamine and methanol

methanamide and ethanol

ethanamide and methanol Juist antwoord

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Lees lesnotitie op Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

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Vraag 34 Verslag

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 Juist antwoord

definite proportions

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Lees lesnotitie op Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

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Vraag 35 Verslag

Suitable reagents for the laboratory preparation nitrogen are?

sodium dioxonitrate (III) and ammonium chloride Juist antwoord

sodium dioxonitrate (V) and ammonium chloride

sodium chloride and ammonium chloride

sodium chloride and ammonium diozonitrate (III)

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Kinetic Theory Of Matter And Gas Laws

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Vraag 36 Verslag

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

NH4CI

NaCO3

FeCl3

NaCl Juist antwoord

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Lees lesnotitie op Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

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Vraag 37 Verslag

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 Juist antwoord

K2Cr2O7 is oxidized

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Acids, Bases And Salts

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Vraag 38 Verslag

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 Juist antwoord

56.0 dm3

44.8 dm3

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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

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Kinetic Theory Of Matter And Gas Laws

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Vraag 39 Verslag

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 Juist antwoord

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Lees lesnotitie op Electrolysis (JAMB)

Electrolysis

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Vraag 40 Verslag

The four classes of hydrocarbons are?

ethane, ethene, ethyne and benzene

alkanes, alkenes, alkynes and aromatics Juist antwoord

alkanes, alkenes, alkynes and benzene

methane, ethane , propane and butane

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Lees lesnotitie op Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Lees lesnotitie op Periodic Chemistry (Ghana Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Periodic Chemistry (Ghana Only)

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Vraag 41 Verslag

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

M3X4

M4X3 Juist antwoord

M3X2

Antwoorddetails

M2+ + X-4 = M4X3

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Chemical Combination

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Vraag 42 Verslag

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

is heavier than air

is less dense than air

is insoluble in water Juist antwoord

burns in oxygen to form carbon (IV) oxide

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Lees lesnotitie op Chemical Equilibria (JAMB)

Chemical Equilibria

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Vraag 43 Verslag

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 Juist antwoord

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

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Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Vraag 44 Verslag

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

evaporation

recrystallization

sublimation Juist antwoord

fractional precipitation

Antwoorddetails

Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Vraag 45 Verslag

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

Cu2+ + 2e- → Cu(s) Juist antwoord

2Cl- -2e → Cl2

Cu(s) -2e → Cu2+(aq)

Cu2+(aq) + 2Cl-(aq) → CuCl2(aq)

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Lees lesnotitie op Kinetic Theory Of Matter And Gas Laws (JAMB)

Lees lesnotitie op Electrolysis (JAMB)

Kinetic Theory Of Matter And Gas Laws

Electrolysis

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