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.

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

150 questions
Question 1 of 20 150 total questions
Question 51
jamb 2009

If the relative atomic mass of an element is not a whole number, it can be deduced that the element is?

ANaturally radioactive
Babundant in nature
Ca transition metal
Dan isotopic mixture
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Question 52
jamb 2009

Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have?

Aa single bond
Ba double bond
Ca triple bond
Dan ionic bond
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Question 53
jamb 2009

The simplest branched-chain hydrocarbon is

Aethane
Bethene
Cpropane
Dbutane
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Question 54
jamb 2009
The molecular formula of a common organic laboratory anaesthetic is
ACHCl3
BCHI3
CCCl4
DCHF3
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Question 55
jamb 2009
Which of the following hydrocarbons is mainly used as fuel?
AMethylene
BEthylene
CMethane
DEthyne
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Question 56
jamb 2009

An organic compound reacted with bromine water to give a colourless solution. The compound is probably an?

Aalkene
Balkanal
Calkyl
Dalkanone
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Question 57
jamb 2009
A compound commonly used for sterilization and preservation of specimens and food is
Aethanol
Bbenzene
Cether
Dammonia
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Question 58
jamb 2009

Lucas reagent is used to test for?

Aalkanes
Balkanoic acids
Calkanols
Damines
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Question 59
jamb 2009
Which of the following class of compounds can exist as dipolar ions in solution?
AAlkanoic acid
BFatty acids
CDialkanoic acids
DAmino acids
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Question 60
jamb 2009

Which of the following molecules has two other positional isomers?

ACH3CH2Br
BCH3CHBrCH3
CCBr2F2
DCH2CHBrCH2Br
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Question 61
jamb 2009
A cracking process in petroleum refining can be represented by
Aheptane to heptene
Bheptane to 3-methylhexane
Cheptane to propene and butane
Dheptane to 2,3,3-trimethybutane
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Question 62
jamb 2009

One of the products of the thermal decomposition of sodium trioxonitrate (V) is?

Asodium
Bnitrogen
Csodium dioxonitrate (III)
Dsodium oxide
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Question 63
jamb 2009
In the electrolytic extraction of aluminum, the function of the molten cryolite is to
Aprecipitate aluminium hdroxide
Blower the melting point of aluminium oxide
Cact as a raw materials
Dact as a solvent
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Question 64
jamb 2009

The type of iron that is best suited for welding, making nails, chains and iron rods is?

Apig iron
Bwrought iron
Ccast iron
Diron pyrites
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Question 65
jamb 2009

Copper metal dissolves in concentrated trioxonitrate (V) acid with the resultant evolution of?

ACO2
BSO2
CNO2
DCO
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Question 66
jamb 2009

which of the following metals will show the highest metallic character?

AZinc
BCopper
CBarium
DCalcium
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Question 67
jamb 2009

Which of the following allotrope of carbon is a constituent of a lead pencil?

AGraphite
BDiamond
CLampblack
DSoot
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Question 68
jamb 2009

The gas that is most useful in protecting humans against solar radiation is?

Achlorine
Bozone
Ccarbon (IV) oxide
Dhydrogen sulphide
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Question 69
jamb 2009

The gasification of coke is used for the manufacturing of?

Aproducer gas
Bnatural gas
Csynthetic gas
Dindustrial gas
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Question 70
jamb 2009

Hydrogen sulphide gas can act as?

Aan oxidizing agent
Ba dehydrating agent
Ca bleaching agent
Da precipitating agent
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