JAMB UTME - Chemistry - 1988 | Green Bridge CBT

Frage 1 Bericht

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

-1 and 7 Richtige Antwort

-1 and 6

-3 and 5

-2 and 6

Antwortdetails

17 = 2, 8, 7

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Frage 2 Bericht

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

Steam distillation

Destructive distillation Richtige Antwort

Liquefaction

Hydrolysis

Antwortdetails

Lies die Unterrichtsnotiz zu Chemical Combination (JAMB)

Chemical Combination

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Frage 3 Bericht

A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?

S dissolves in the solution

crystals of R are precipitated Richtige Antwort

there is no observable change

R and S react to generate heat

Antwortdetails

Lies die Unterrichtsnotiz zu Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Separation Of Mixtures And Purification Of Chemical Substances

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Frage 4 Bericht

Which of the following is used in fire extinguishers?

Carbon (ll) oxide

Carbon (lV) oxide Richtige Antwort

Sulphur (lV) oxide

Ammonia

Antwortdetails

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Frage 5 Bericht

Methylethanoate reacts with ammonia to yield?

mettylamine and ethanol

ethylamine and methanol

methanamide and ethanol

ethanamide and methanol Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

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Frage 6 Bericht

The IUPAC name for

2-methylbutanoic acid Richtige Antwort

2-methyl-1- hydroxyketone

2-methyl-1-hydroxy aldehyde

2-methylpentanoic acid

Antwortdetails

Lies die Unterrichtsnotiz zu Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

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Frage 7 Bericht

Which of the following compounds has the highest boiling point?

CH3CH2CH2CH2HO Richtige Antwort

CH3CH2CH2CHO

CH3CH2CH2CH3

CH3CH2OCH2CH3

Antwortdetails

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Frage 8 Bericht

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

nitrogen (ll) oxide

nitrogen (l) oxide

nitrogen (lV) oxide Richtige Antwort

nitrogen

Antwortdetails

Lies die Unterrichtsnotiz zu Chemical Bonds (Nigeria Only) (WAEC)

Chemical Bonds (Nigeria Only)

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Frage 9 Bericht

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

Heat content (enthalphy)

Energy of activation Richtige Antwort

Free energy change

Equilibrium position

Antwortdetails

Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 10 Bericht

Alkanoates are formed by the reaction of alkanoic acid with?

Alkyl halides

alkanols Richtige Antwort

ethers

sodium

Antwortdetails

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Frage 11 Bericht

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

Ionization potenial

Electron affinity

Electronegativity

Atomic radius Richtige Antwort

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Lies die Unterrichtsnotiz zu Periodic Chemistry (Nigeria Only) (WAEC)

Periodic Chemistry (Nigeria Only)

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Frage 12 Bericht

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

evaporation

recrystallization

sublimation Richtige Antwort

fractional precipitation

Antwortdetails

Lies die Unterrichtsnotiz zu Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Separation Of Mixtures And Purification Of Chemical Substances

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Frage 13 Bericht

The four classes of hydrocarbons are?

ethane, ethene, ethyne and benzene

alkanes, alkenes, alkynes and aromatics Richtige Antwort

alkanes, alkenes, alkynes and benzene

methane, ethane , propane and butane

Antwortdetails

Lies die Unterrichtsnotiz zu Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Lies die Unterrichtsnotiz zu Periodic Chemistry (Ghana Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

Periodic Chemistry (Ghana Only)

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Frage 14 Bericht

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

is heavier than air

is less dense than air

is insoluble in water Richtige Antwort

burns in oxygen to form carbon (IV) oxide

Antwortdetails

Lies die Unterrichtsnotiz zu Chemical Equilibria (JAMB)

Chemical Equilibria

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Frage 15 Bericht

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

lll

lV Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Energy Changes (JAMB)

Lies die Unterrichtsnotiz zu Energy And Energy Changes (WAEC)

Energy Changes

Energy And Energy Changes

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Frage 16 Bericht

Suitable reagents for the laboratory preparation nitrogen are?

sodium dioxonitrate (III) and ammonium chloride Richtige Antwort

sodium dioxonitrate (V) and ammonium chloride

sodium chloride and ammonium chloride

sodium chloride and ammonium diozonitrate (III)

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Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 17 Bericht

Which of the gas laws does the above graph illustrate?

Boyle

Charles Richtige Antwort

Graham

Gay-Lussac

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Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 18 Bericht

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 Richtige Antwort

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

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Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 19 Bericht

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 Richtige Antwort

the crude copper is made the cathode of the cell

crude copper electrodes are used

Antwortdetails

Lies die Unterrichtsnotiz zu Electrolysis (JAMB)

Electrolysis

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Frage 20 Bericht

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

first ionization energy

second ionization energy

electron affinity Richtige Antwort

electronegativity

Antwortdetails

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 21 Bericht

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 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Electrolysis (JAMB)

Electrolysis

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Frage 22 Bericht

Detergents have the general formula?

R(CH2)nOH

RSO3-Na+ Richtige Antwort

RSO-2Na+

RSO2H

Antwortdetails

Lies die Unterrichtsnotiz zu Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

Chemistry Of Carbon Compounds (Nigeria Only)

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Frage 23 Bericht

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 Richtige Antwort

density of the molecules

free mean path between each molecules and other

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Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 24 Bericht

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 Richtige Antwort

acidified KMnO4 and water

water, acidified KMnO4 and oxygen

Antwortdetails

Lies die Unterrichtsnotiz zu Environmental Pollution (JAMB)

Environmental Pollution

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Frage 25 Bericht

Chlorine is produced commercially by?

electrolysis of dilute hydrochloric acid

electrolysis of brine Richtige Antwort

neutralization of hydrogen chloride

heating potassium trioxochlorate (V)

Antwortdetails

Lies die Unterrichtsnotiz zu Electrolysis (JAMB)

Electrolysis

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Frage 26 Bericht

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 Richtige Antwort

oxygen is heavier than nitrogen

nitrogen has a higher partial pressure in air

gases are hydrated in water

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Lies die Unterrichtsnotiz zu Water (JAMB)

Water

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Frage 27 Bericht

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 Richtige Antwort

K2Cr2O7 is oxidized

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Lies die Unterrichtsnotiz zu Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Frage 28 Bericht

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 Richtige Antwort

zinc

calcium

lead

Antwortdetails

Lies die Unterrichtsnotiz zu Chemical Equilibria (JAMB)

Chemical Equilibria

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Frage 29 Bericht

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

M3X4

M4X3 Richtige Antwort

M3X2

Antwortdetails

M2+ + X-4 = M4X3

Lies die Unterrichtsnotiz zu Chemical Combination (JAMB)

Chemical Combination

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Frage 30 Bericht

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 Richtige Antwort

56.0 dm3

44.8 dm3

Antwortdetails

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

Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 31 Bericht

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

Mg+

K+

CO22- Richtige Antwort

HCO3

Antwortdetails

Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (JAMB)

Kinetic Theory Of Matter And Gas Laws

Acids, Bases And Salts

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Frage 32 Bericht

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

evaporation

recrystallization

sublimation Richtige Antwort

fractional precipitation

Antwortdetails

Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 33 Bericht

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

SO2 Richtige Antwort

H2S

CO2

Antwortdetails

Lies die Unterrichtsnotiz zu Oxidation And Reduction (JAMB)

Oxidation And Reduction

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Frage 34 Bericht

Which of the following substances is a basic salt?

Na2CO3

Mg(OH)CI Richtige Antwort

NaHCO3

KSO4.AI2(SO4)3,24H2O

Antwortdetails

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

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Frage 35 Bericht

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 Richtige Antwort

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

Antwortdetails

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.

Lies die Unterrichtsnotiz zu Kinetic Theory Of Matter And Gas Laws (JAMB)

Kinetic Theory Of Matter And Gas Laws

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Frage 36 Bericht

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

NH4CI

NaCO3

FeCl3

NaCl Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Acids, Bases And Salts (Ghana Only) (WAEC)

Acids, Bases And Salts (Ghana Only)

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Frage 37 Bericht

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 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Energy Changes (JAMB)

Energy Changes

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Frage 38 Bericht

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 Richtige Antwort

definite proportions

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Lies die Unterrichtsnotiz zu Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

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Frage 39 Bericht

Aluminium is extracted commercially from its ore by?

heating aluminium oxide with coke in a furance

the electrolysis of fused aluminium oxide in cryolite Richtige Antwort

treating cryolite with sodium hydroxide solution under prressure

heating sodium aluminium silicate to a high temperature

Antwortdetails

Lies die Unterrichtsnotiz zu Electrolysis (JAMB)

Electrolysis

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Frage 40 Bericht

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 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

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Frage 41 Bericht

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 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Oxidation And Reduction (JAMB)

Oxidation And Reduction

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Frage 42 Bericht

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

20 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 43 Bericht

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 Richtige Antwort

Antwortdetails

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 44 Bericht

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