Chemistry Past Questions

Study and practice Chemistry past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.

46 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

46 questions
Question 1 of 20 46 total questions
Question 1
jamb 1995

The functional group represented in the compound above is?

Aalkanol
Balkanal
Calkanone
Dalanoate
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Question 2
jamb 1995

The option above shows the PH changes for the titration of a

Astrong acid versus strong base
Bweak acid versus strong base
Cstrong acid versus weak base
Dweak acid versus weak base
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Question 3
jamb 1995

It can be deduced that the rate of the reaction?

Afor path l is higher than path ll
Bfor path ll is higher than path l
Cis the same for both paths at all temperatures
Ddepends on the values of both x and y at all pressures
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Question 4
jamb 1995

Use the diagram above to answer this question. The activation energy of the uncatalysed reaction is

AX
BX + Y
CX - Y
DY
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Question 5
jamb 1995

The arrangement above can be used for the collection of

Asulphur (IV) oxide
Bammonia
Chydrogen chloride
Dnitrogen
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Question 6
jamb 1995
USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which letter represents a non-metal that is a solid at room temperature?
AT
BR
CJ
DX
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Question 7
jamb 1995

USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which of the indicate an alkali metal and a noble gas respectively?

AM and E
BG and E
CR and L
DG and L
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Question 8
jamb 1995
The relatively high boiling points of alkanols are due to?
Aionic bonding
Baromatic character
Ccovalent bonding
Dhydrogen bonding
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Question 9
jamb 1995
An example of a secondary amine is?
Apropylene
Bdi-butylamine
Cmethylamine
Dtrimethylamine
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Question 10
jamb 1995
CxHY + 4O2 → 3CO2 + 2H2O. The hydrocarbon, CxHY, in the reaction above is?
Apropane
Bpropene
Cpropyne
Dpropanone
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Question 11
jamb 1995
The role of sodium chloride in the preparation of soap is to?
Apurify the soap
Bseparate the soap from glycerol
Caccelerate the decomposition of the fat or oil
Dreact with glycerol
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Question 12
jamb 1995

Aromatic and aliphatic hydrocarbons can be distinguished from each other by the?

Aaction of bromine
Buse of polymerization reaction
Caction of heat
Duse of oxidation reaction
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Question 13
jamb 1995

Which of the following pairs has compounds that are isomers?

APropanal and propanone
BEthanoic acid and ethylmethanoate
CEthanoic acid and ethane-1, 2-diol
D2-methylbutane and 2, 2-dimethylbutane
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Question 14
jamb 1995
CHCl3 + Cl2 → HCl + CCl4. The reaction above is an example of?
Aan addition reaction
Ba substitution reaction
Ca chlorination reaction
Da condensation reaction
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Question 15
jamb 1995
Group 1 A metals are not found free in nature because they?
Aare of low melting and boiling points
Bhave weak metallic bonding
Cconduct electricity and heat
Dare very reactive
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Question 16
jamb 1995
Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?
ANaCl
BLiCl
CCaCl2
DMgCl2
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Question 17
jamb 1995
In the extraction of iron in the blast furnace, limestone is used to?
Arelease CO2 for the reaction
Breduce the iron ore
Cincrease the strenght of the iron
Dremove impurities
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Question 18
jamb 1995
Which of the following ions will give a white precipitate with aqueous NaOH and soluble in excess of the base?
ACa2+
BMg2+
CZn2+
DCu2+
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Question 19
jamb 1995
A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?
Asulphur (lV) oxide
Bhydrogen sulphide
Csulphide (lV) oxide
Dhydrogen chloride
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Question 20
jamb 1995
Sulphur exists in six forms in the solid state. This property is known as?
Aisomerism
Ballotropy
Cisotopy
Disomorphism
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