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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
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Question 1 of 20 50 total questions
Question 11
jamb 2016

Ethanol is soluble in water due to the presence of a

ACarbonyl group
BHydroxyl group
CPhenyl group
DMethyl group
View Explanation & Discuss
Question 12
jamb 2016
Diamond cannot be used
AIn making bicycle chains
BAs abrasives
CIn cutting glass and metals
DAs dies for drawing wires
View Explanation & Discuss
Question 13
jamb 2016

What volume of 0.5M H2SO4 will exactly neutralize 20cm3 of 0.1M NaOH Solution?

A2.0cm 3
B5.0cm 3
C6.8cm 3
D8.3cm 3
View Explanation & Discuss
Question 14
jamb 2016
An example of an acidic oxide is
ANO
BCO
CSO2
DCuO
View Explanation & Discuss
Question 15
jamb 2016

The metal whose ore can be concentrated by passing it through a magnetic separator is

AZn
BSn
CCu
DCa
View Explanation & Discuss
Question 16
jamb 2016
Which of the following statements is correct about the periodic table?
AElements in the same group have the same number of electron shells
BThe non-metallic properties of the elements tend to decrease across each period
CElements in the same period have the same number of valence electrons
DThe valence electrons of the elements increase progressively across the period
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Question 17
jamb 2016

Which of the following is not an alkali?

ACa(OH)2
BNH3
CNaOH
DAl(OH)3
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Question 18
jamb 2016

Alkanols have the general molecular formula

ACnH2n-2
BCnH2n+1CHO
CCnH2n-2OH
DCnH2n+1OH
View Explanation & Discuss
Question 19
jamb 2016

The products formed when primary Alkanols are oxidized using acidified potassium tetraoxomanganate (VII) are what?

ACH3CH2CHO and H2O
BCH3CHO and CO2
CCH3CH2COOH and H2
DCH3COOH and CO2
View Explanation & Discuss
Question 20
jamb 2016

Which of the following compounds is used as a gaseous fuel?

ACH3 -CH2 -CHO2 -COOH
BCH3 -C = CH
CCH3 -CH2 -CH2 -CH3
DCH2 -CH2 -CH3
View Explanation & Discuss
Question 21
jamb 2016
Cast iron is used in making
AChains and agricultural implements
BIron sheets and retort stand
CNails and iron rods
DStoves and cookers
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Question 22
jamb 2016
Which of the following properties is not peculiar to matter?
AKinetic energy of particles increases from solid to gas
BRandom motion of particles increases from gas to solid
COrderliness of particles increases from gas to liquid
DRandom motion of particles increases from liquid to gas
View Explanation & Discuss
Question 23
jamb 2016
The pollutant that contributes to the depletion of the ozone layer is
ACFCs
BNO2
CSO2
DCO
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Question 24
jamb 2016
The compound produced when sodium peroxide is heated with excess sodium is
ANa2CO3
BNa2O
CNaNO2
DNaOH
View Explanation & Discuss
Question 25
jamb 2016
The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
APhosphorus-32
BCobalt-60
CCarbon-14
DIodine-131
View Explanation & Discuss
Question 26
jamb 2016
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
A0.05 moldm-3
B0.30 moldm-3
C0.50 moldm-3
D0.40 moldm-3
View Explanation & Discuss
Question 27
jamb 2016
The process that requires the use of hardwater in its operation is
ATanning
BBottling
CLaundry
DDyeing
View Explanation & Discuss
Question 28
jamb 2016

Which of the following statements is true about 2-methylpropane and butane

AThey have different number of carbon atoms
BThey are members of same homologous series
CThey have the same boiling points
DThey have different chemical properties
View Explanation & Discuss
Question 29
jamb 2016
The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using
ADilute ammonia
BBenedict's solution
CTollen's reagent
DSodium hydroxide solution
View Explanation & Discuss
Question 30
jamb 2016
The colour of litmus in an alkaline medium is
ARed
BYellow
CPink
DBlue
View Explanation & Discuss
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