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.

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

50 questions
Question 1 of 20 50 total questions
Question 1
jamb 2007

Use the diagram above to answer the question below:

The alternative raw material labelled M is 

Acarbon
Bsteam
Coxygen
Dnatural gas
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Question 2
jamb 2007

Use the diagram above to answer the question below:

The fuel gas labelled L is 

Awater gas
Bhydrogen
Cnitrogen
DCarbon(IV) oxide
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Question 3
jamb 2007

Which of the compounds above is a tertiary alkanol?

AD
BC
CA
DB
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Question 4
jamb 2007
What weight of NaCl is needed to make 2.0 dm3 of a 1.5M solution?
[Na = 23, Cl = 35.5]
A116 g
B175 g
C87 g
D58 g
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Question 5
jamb 2007

Smog usually occurs over cities which

Aburn a lot of fossil fuels
Bhave very few plants
Care surrounded by water
Dare overpopulated
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Question 6
jamb 2007

A good drying agent should be

Adeliquescent
Beffervescent
Chygroscopic
Defflorescent
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Question 7
jamb 2007

The presence of nitrogen in air is to slow down

Arespiration and combustion
Bcombustion and corrosion
Ccorrosion and respiration
Drespiration and transpiration
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Question 8
jamb 2007

A supersaturated solution is said to contain

Amore solute than it can dissolve at that temperature in the presence of undissolved solute
Bas much solute as it can dissolve at that temperature in the presence of undissolved solute
Cas much solute as it can dissolve at that temperature
Dmore solute than it can dissolve at that temperature
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Question 9
jamb 2007

When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit of

Acalcium tetraoxosulphate(VI)
Bcalcium trioxocarbonate (IV)
Ccalcium hydrogentrioxocarbonate (IV)
Daluminium trioxocarbonate (IV)
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Question 10
jamb 2007

The IUPAC nomenclature of compound CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is

Apropyl ethanoate
Bethyl butanoate
Cethyl propanoate
Dmethyl butanoate
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Question 11
jamb 2007

Certain useful waxes are composed mainly of

Aamino acids
Bglycerols
Calkanols
Dalkanoates
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Question 12
jamb 2007

Which of the following alkanes has the highest boiling point?

APentane
BEthane
CPropane
DMethane
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Question 13
jamb 2007

The conversion of open chain alkanes into cycloalkanes and aromatic compounds is called

Acracking
Breforming
Cisomerization
Dpolymerization
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Question 14
jamb 2007

How many structural isomers of chlorobutane are possible?

A4
B3
C2
D1
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Question 15
jamb 2007

The hydrocarbon used in the production of styrene is

Aethyne
Bpropyne
Cethane
Dethene
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Question 16
jamb 2007

Which of the following compounds is the best possible anti-knock agent for petrol?

A(CH3)2CH - CH(CH3)CH2CH3
BCH3CH2(CH3)CHCH2CH2CH3
CCH3CH2(CH3)CHCH2CH2CH3
D(CH3)3C - CH2CH2CH3
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Question 17
jamb 2007

CH\(_3\)CH\(_2\)Cl + KCN → CH\(_3\)CH\(_2\)CN + KCl

In the reaction above, the cyanide is

Ahydrophobic
Bhydrophilic
Cnucleophilic
Delectrophilic
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Question 18
jamb 2007

Which of the following represents an aromatic compound?

AC6H5OH
BC6H12
CC6H9OH
DC6H8
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Question 19
jamb 2007

A mixture of petrol and water can be separated through

Acentrifugation
Bdistillation
Cthe use of separating funnel
Dthe use of filter paper
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Question 20
jamb 2007

A metal X forms two bromides with the formulae XBr2 and XBr3. What type of bonding exists between X and bromine in the bromide?

AIonic bonding
BMetallic bonding
CDative bonding
DCovalent bonding
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