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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.

2,505 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

2,505 questions
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Question 1 of 20 2,505 total questions
Question 351
jamb 2016

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

AZn
BSn
CCu
DCa
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Question 352
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 353
jamb 2016

Which of the following is not an alkali?

ACa(OH)2
BNH3
CNaOH
DAl(OH)3
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Question 354
jamb 2016

Alkanols have the general molecular formula

ACnH2n-2
BCnH2n+1CHO
CCnH2n-2OH
DCnH2n+1OH
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Question 355
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
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Question 356
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
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Question 357
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 358
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
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Question 359
jamb 2016
The pollutant that contributes to the depletion of the ozone layer is
ACFCs
BNO2
CSO2
DCO
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Question 360
jamb 2016
The compound produced when sodium peroxide is heated with excess sodium is
ANa2CO3
BNa2O
CNaNO2
DNaOH
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Question 361
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
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Question 362
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
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Question 363
jamb 2016
The process that requires the use of hardwater in its operation is
ATanning
BBottling
CLaundry
DDyeing
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Question 364
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
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Question 365
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
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Question 366
jamb 2016
The colour of litmus in an alkaline medium is
ARed
BYellow
CPink
DBlue
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Question 367
jamb 2016
The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is
A6.2
B6.8
C7.1
D6.9
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Question 368
jamb 2016
The industrial preparation of hydrogen gas from water gas is referred to as
ABosch process
BContact process
CHaber process
DBayer Process
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Question 369
jamb 2016
The ability of carbon to form long chains is referred to as
AAlkylation
BAcylation
CCarbonation
DCatenation
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Question 370
jamb 2016
Ammonium chloride can be separated from its mixture with common salt by
ADistillation
BEvaporation
CDecantation
DSublimation
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