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.

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

96 questions
Question 1 of 16 96 total questions
Question 41
jamb 2022

A chemical widely used as a fertilizer is?

Agalena
Bbauxite
Cemerald
Dnitrochalk
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Question 42
jamb 2022

Addition of sodium chloride to water to form a solution would  lead to?

Aincrease in freezing point and increase the boiling point
Bincrease in freezing point and decrease the boiling point
Cdecrease in freezing point and decrease the boiling point
Ddecrease in freezing point and increase the boiling point
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Question 43
jamb 2022

An organic compound which liberate carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be?

AC\(_2\)H\(_5\)OH
BC\(_3\)H\(_4\)
CC\(_6\)H\(_6\)
DCH\(_3\)COOH
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Question 44
jamb 2022

The sulphide that is commonly used in coating electric fluorescent tubes is?

Airon(ii)Sulphide
Btin(ii)sulphide
CZinc Sulphide
Dlead(iv) Sulphide
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Question 45
jamb 2022

How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?

A18
B20
C37
D17
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Question 46
jamb 2022

The following non-metal form acidic oxides with oxygen except?

Aphosphorus
Bsulphur
Ccarbon
Dchlorine
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Question 47
jamb 2022

In the preparation of salts, the method employed will depend on the?

Acomposition
Bdissociating ability
Cstability to heat
Dprecipitating ability
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Question 48
jamb 2022

SO\(_2\) + O\(_2\) → 2SO\(_3\)

In the reaction above, the most suitable catalyst is?

Achromium(vi)oxide
Biron(iii)oxide
Ccopper(i)oxide
Dvanadium(v)oxide
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Question 49
jamb 2022

 

The IUPAC nomenclature of the structure is?

A3-chloro-3-methylbutane
B2,2,-dichloro-3-methylbutane
C3-methylchlorobutane
D2-chloro-2-methylbutane
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Question 50
jamb 2022

The sub-atomic particles located in the nucleus of an atom are?

Aneutron and proton
Bproton and electron
Cproton and ions
Dneutron and electron
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Question 51
jamb 2022
Isotopes of an element have the same
Aatomic mass
Bnumber of neutrons
Cmass number
Datomic number
Question 52
jamb 2022
Which of these is an element?
Awater
Bsalt
Coxygen
Dair
Question 53
jamb 2022
The molar mass of H¸?O (H=1, O=16) is
A2 g
B36 g
C18 g
D16 g
Question 54
jamb 2022
Which process separates a solid from a liquid using a filter paper?
Asublimation
Bcrystallisation
Cdistillation
Dfiltration
Question 55
jamb 2022
The formula of sulphuric acid is
ASO???
BH???SO???
CH???SO???
DH???S
Question 56
jamb 2022
The atomic number of an element is the number of
Aprotons
Bnucleons
Celectrons + neutrons
Dneutrons
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