Chemistry Past Questions

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

2,505 questions
Question 1 of 20 2,505 total questions
Question 341
jamb 2016

The diagram represents

AA spontaneous reaction
BAn exothermic reaction
CA non-spontaneous
DAn endothermic reaction
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Question 342
jamb 2016
In the diagram above, X is the
AEnthalphy
BActivated complex
CActivation energy
DEnthalphy change
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Question 343
jamb 2016

The functional groups present in the compound above are

AAlkene and halo-group
BHydroxyl and chloro-group
CAlkene and chloro-group
DHydroxyl and halo-group
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Question 344
jamb 2016
n monosaccharide \( \underset{Q}{\stackrel{P}{\rightleftharpoons}} \) polysaccharide -n water.

In the process above, P and Q respectively represent
ACondensation and hydrolysis
BFermentation and condensation
CPolymerization and hydrolysis
DPolymerization and condensation
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Question 345
jamb 2016

The compound above exhibits

AGeometric isomerism
BPositional isomerism
CStructural isomerism
DOptical isomerism
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Question 346
jamb 2016

MnO\(_4\)(aq) + Y + 5Fe\(^{2+}\) (aq) \(\mapsto\) Mn\(^{2+}\) (aq) + 5Fe\(^{3+}\) (aq) + 4H\(_2\)O (l).

In the equation above, Y is

A10H+ (aq)
B5H+ (aq)
C8H+ (aq)
D4H+ (aq)
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Question 347
jamb 2016

A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as

AA reversible reaction
BA spontenous reaction
CAn endothermic reaction
DAn exothermic reaction
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Question 348
jamb 2016
The gas that is used for the treatment of cancer is
ANeon
BRadon
CXenon
DArgon
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Question 349
jamb 2016
Calculate the volume in cm3 of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s?
[F = 96500 C mol1. Molar volume of a gas at s.t.p = 22.4dm3]
A0.056dm3
B0.224dm3
C224.000dm3
D56.000dm3
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Question 350
jamb 2016
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is
A16
B15
C31
D46
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Question 351
jamb 2016
An example of a solid emulsion is
AButter
BHair cream
CMilk
DCod-liver oil
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Question 352
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 353
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
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Question 354
jamb 2016
The arrangement of particles in crystal lattices can be studied using
AX-rays
B\(\beta\)-rays
C\(\alpha\)-rays
D\(\gamma\)-rays
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Question 355
jamb 2016
The drying agent suitable for drying ammonia is
ACalcium Chloride
BCalcium Oxide
CPhosphorus(V) Oxide
DConcentrated H2SO4
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Question 356
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 357
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 358
jamb 2016
Diamond cannot be used
AIn making bicycle chains
BAs abrasives
CIn cutting glass and metals
DAs dies for drawing wires
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Question 359
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 360
jamb 2016
An example of an acidic oxide is
ANO
BCO
CSO2
DCuO
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