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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.

4,306 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

4,306 questions
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Question 1 of 20 4,306 total questions
Question 601
jamb 2016

In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is

ABlue
BRed
COrange
DPurple
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Question 602
jamb 2016

In the extraction of iron, the waste gas from the furnace is a mixture of

APH3 CO and CO2
BCO and C
CN2 , CO and CO2
DPH3 and CO
View Explanation & Discuss
Question 603
jamb 2016
The arrangement of particles in crystal lattices can be studied using
AX-rays
B\(\beta\)-rays
C\(\alpha\)-rays
D\(\gamma\)-rays
View Explanation & Discuss
Question 604
jamb 2016
The drying agent suitable for drying ammonia is
ACalcium Chloride
BCalcium Oxide
CPhosphorus(V) Oxide
DConcentrated H2SO4
View Explanation & Discuss
Question 605
jamb 2016

The number of electronic shells contained in an atom with electron configuration 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^6\)4S\(^2\) is

A3
B2
C4
D5
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Question 606
jamb 2016

Ethanol is soluble in water due to the presence of a

ACarbonyl group
BHydroxyl group
CPhenyl group
DMethyl group
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Question 607
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 608
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
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Question 609
jamb 2016
An example of an acidic oxide is
ANO
BCO
CSO2
DCuO
View Explanation & Discuss
Question 610
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 611
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 612
jamb 2016

Which of the following is not an alkali?

ACa(OH)2
BNH3
CNaOH
DAl(OH)3
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Question 613
jamb 2016

Alkanols have the general molecular formula

ACnH2n-2
BCnH2n+1CHO
CCnH2n-2OH
DCnH2n+1OH
View Explanation & Discuss
Question 614
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 615
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 616
jamb 2016
Cast iron is used in making
AChains and agricultural implements
BIron sheets and retort stand
CNails and iron rods
DStoves and cookers
View Explanation & Discuss
Question 617
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 618
jamb 2016
The pollutant that contributes to the depletion of the ozone layer is
ACFCs
BNO2
CSO2
DCO
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Question 619
jamb 2016
The compound produced when sodium peroxide is heated with excess sodium is
ANa2CO3
BNa2O
CNaNO2
DNaOH
View Explanation & Discuss
Question 620
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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