JAMB UTME - Chemistry - 1987 | Green Bridge CBT

The reaction between sulphur (IV) oxide and oxygen is represented by the equilibrium reaction 2SO2(g) + O2(g) ↔ 2SO3(g), ∆H = -196 kJ. What factor would influence increased production of SO3(g)?

Addition of a suitable catalyst

Increase in the temperature of the reaction

Decrease in the temperature of the reaction Richtige Antwort

Decrease in the concentration of SO2(g)

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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 7 Bericht

Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the?

acid

ester of allanoic acid

alkali Richtige Antwort

alkanol

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

Acids, Bases And Salts

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Frage 8 Bericht

In which of the following pairs of element is allotropy exhibited by each element?

Phosphorus and hydrogen

Oxygen and chlorine

Sulphur and nitrogen

Oxygen and sulphur Richtige Antwort

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Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 9 Bericht

Use the option above to answer this question. The structure of benzoic acid is

D Richtige Antwort

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

Chemistry Of Carbon Compounds (Nigeria Only)

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Frage 10 Bericht

Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?

nitrogen Richtige Antwort

chlorine

oxygen

sulphur (IV) oxide

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Lies die Unterrichtsnotiz zu Chemical Combination (JAMB)

Chemical Combination

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Frage 11 Bericht

Temp (°C)	25	35	45
Time (seconds)	72	36	18

The times taken for iodine to be liberated in the reaction between sodium thiosulphate and hydrochloric acid at various temperature are as follows. These results suggest that

for a 10o rise in temperature, rate of reaction is double Richtige Antwort

for a 10 o rise in temperature, rate of reaction is halved

time taken for iodine to appear does not depend on temperature

for a 10 o rise in temperature rate of reaction is tripled

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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 12 Bericht

In the purification of town water supply, alum is used principally to?

kill bacteria

control the pH of water

improve the taste of the water

coagulate small pasrticles of mud Richtige Antwort

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Lies die Unterrichtsnotiz zu Solubility (JAMB)

Solubility

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Frage 13 Bericht

Oil spillage in ponds and creeks can be cleaned up by?

burning off the oil layer

spraying with detergent Richtige Antwort

dispersal with compressed air

spraying with hot water

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Lies die Unterrichtsnotiz zu Environmental Pollution (JAMB)

Environmental Pollution

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Frage 14 Bericht

If 24.83 cm3 of 0.15 M NaOH is titrated to its end point with 39.45 cm3 of HCl, what is the molarity of the HCl?

0.094 M Richtige Antwort

0.150 M

0.940 M

1.500 M

Antwortdetails

NaOH + HCl → NaCl + H2O moles ratio = 1/1
↔ (MaVa) / Mb x 39.45 = 0.094

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

Acids, Bases And Salts

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Frage 15 Bericht

The efficiency of petrol as a fuel in high-compression internal combustion engines improves with an increase in the amount of?

branched chain alkanes Richtige Antwort

straight chain alkanes

cycloalkanes

halogenated hydrocarbons

Antwortdetails

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Frage 16 Bericht

Inspite of the electronic configuration, 1s22s22p2, carbon is tetraavalent because?

the electrons in both 2s and 2p orbitals have equal energy

the electrons in both 2s and 2p orbitals are equivalent

both the 2s and 2p orbitals hybridizes Richtige Antwort

the six orbitals hybridize to four

Antwortdetails

both the 2s and 2p orbitals hydrodizes

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 17 Bericht

Ethanol reacts with aqueous sodium mono-oxoio date (l) to give a bright yellow solid with a characteristic smell. The product is?

trichloromethane

triodomethane Richtige Antwort

iodoethane

ethanal

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

Acids, Bases And Salts

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Frage 18 Bericht

The most volatile fraction obtained from fractional distillation of crude petroleum contains?

butane , propane and kerosene

butane , propane and petrol

ethane, methane and benzene

methane, ethane and propane Richtige Antwort

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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 19 Bericht

In which of the following are the aqueous solutions of each of the substances correctly arranged in order to decreasing acidity?

Ethanoic acid, milk or magnesia, sodium chloride, hydrochloric acid and sodium hydroxide

Ethanoic acid, hydrochloric acid, milk of magnesia, sodium chloride and sodium chloride and sodium hydroxide

Hydrochloride acid, ethanol acid, sodium chloride, milk of magnesia and sodium hydroxide Richtige Antwort

Hydrochloride acid, sodium hydroxide sodium chloride, ethanol acid, and milk of magnesia

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

Acids, Bases And Salts

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Frage 20 Bericht

The best treatment for a student who accidentally poured concentrated tetraoxosulphate (VI) acid on his skin in the laboratory is to wash the skin with?

cold water

sodium hydroxide solution Richtige Antwort

iodine solution

sodium trioxocarbonate (IV) solution

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

Acids, Bases And Salts (Ghana Only)

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Frage 21 Bericht

Which of the following water samples will have the highest titre value when titrated for the Ca2+ ions using soap solution?

Permanently hard water after boiling Richtige Antwort

emporarily hard water after boiling

Rain water stored in a glass jar for two years

Permanent hard water passed through permuitit

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Lies die Unterrichtsnotiz zu Water (JAMB)

Water

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Frage 22 Bericht

Which of the following elements will form oxide which will dissolve both in dilute HNO3 and NaOH solutions to form salts?

Al Richtige Antwort

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Lies die Unterrichtsnotiz zu Non-metals And Their Compounds (JAMB)

Non-metals And Their Compounds

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Frage 23 Bericht

An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?

Neutrons 53, Protons 17

Neutrons 17, Protons 36

Neutrons 19, Protons 17 Richtige Antwort

Neutrons 36, Protons 17

Antwortdetails

Mass number = number of protons + number of neutrons
36 = 17 + X; X = 36 -17 = 19
19 neutrons and 17 protons

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 24 Bericht

The greater the different in electronegativity between bonded atoms, the?

lower the polarity of the bond

higher the polarity of the bond

weaker the bond Richtige Antwort

higher the possibility of the substance formed being a molecul

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

Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Chemical Bonds (Ghana Only)

Atomic Structure And Bonding

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Frage 25 Bericht

Stainless steel is an alloy of?

Iron, carbon and silver

iron, carbon and lead

iron, carbon and chromium Richtige Antwort

iron and carbon only

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Lies die Unterrichtsnotiz zu Oxidation And Reduction (JAMB)

Oxidation And Reduction

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Frage 26 Bericht

Synthetic rubber is made by polymerization of?

2 methyl buta - 1, 3 - diene Richtige Antwort

2 methyl buta - 1, 2 - diene

2 methyl but -1-ene

2 methyl but-2-ene

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Lies die Unterrichtsnotiz zu Basic Biochemistry And Synthetic Polymers (WAEC)

Basic Biochemistry And Synthetic Polymers

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Frage 27 Bericht

Which of the following gases can best be used for demonstrating the fountain experiment?

I) Nitrogen (ii) Ammonia (iii) Nitrogen (I) oxide

(iv) Hydrogen chloride.

ii and iii

i and iii

ii and iv Richtige Antwort

ii only

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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 28 Bericht

The atomic numbers of two elements X and Y are 12 and 19 respectively. The bond of these two elements is?

ionic

covalent Richtige Antwort

neutral

co-ordinate

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Lies die Unterrichtsnotiz zu Atomic Structure And Bonding (JAMB)

Atomic Structure And Bonding

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Frage 29 Bericht

When water drops are added to calcium carbide in a container and the gas is passed through a jet and lifted, the resultant flame is called an?

oxyethylene flame

oxyhydrocarbon flame

oxyacetylene flame Richtige Antwort

oxymethane flame

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

Acids, Bases And Salts (Ghana Only)

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Frage 30 Bericht

Which of the following compounds will give a precipitate with an aqueous ammoniacal solution of copper (l) chloride?

CH3 = CHCH3

CH3 ≡ CCH3 Richtige Antwort

HC = C-CH2CH3

CH2 = CH-CH = CH2

Antwortdetails

HC = C-CH2CH3

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

Periodic Chemistry (Ghana Only)

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Frage 31 Bericht

If d represents the density of a gas and K is a constant, the rate of gaseous diffusion r is related to d by the equation?

r = k/√d Richtige Antwort

r = kd

r =k/d

r = k √d

Antwortdetails

r = k /√d

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

Kinetic Theory Of Matter And Gas Laws

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Frage 32 Bericht

A stream of air was successively passed through three tubes X, Y and Z containing a concentrated aqueous solution of KOH, red hot copper powder and fused calcium chloride respectively. What was the composition of the gas emanating from tube Z?

CO2 ad ithe inert gases

N2, CO2 and the inert gases

N2 and the inert gases Richtige Antwort

water vapour, N2 and the inert gases

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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 33 Bericht

An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?

16.0

16.2 Richtige Antwort