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 181
jamb 2022

An organic compound with fishy smell is likely to have a general formula?

ARCONH\(_2\)
B
CRNH\(_2\)
DRCOR\(^1\)
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Question 182
jamb 2022

Using the metal activity series, the metal that can liberate hydrogen gas from steam is?

Airon
Bcopper
Ctin
Dlead
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Question 183
jamb 2022

Addition of charcoal to the filter bed of sand during water treatment for township supply is to?

Aprevent goiter
Bprevent tooth decay
Cremove odour
Dkill germs
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Question 184
jamb 2022

On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell

Acu\(^{2+}\)
Bsn\(^{2+}\)
Cfe\(^{2+}\)
Dzn\(^{2+}\)
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Question 185
jamb 2022

A chemical widely used as a fertilizer is?

Agalena
Bbauxite
Cemerald
Dnitrochalk
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Question 186
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 187
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 188
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 189
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 190
jamb 2022

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

Aphosphorus
Bsulphur
Ccarbon
Dchlorine
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Question 191
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 192
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 193
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 194
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 195
jamb 2022
Isotopes of an element have the same
Aatomic mass
Bnumber of neutrons
Cmass number
Datomic number
Question 196
jamb 2022
Which of these is an element?
Awater
Bsalt
Coxygen
Dair
Question 197
jamb 2022
The molar mass of H¸?O (H=1, O=16) is
A2 g
B36 g
C18 g
D16 g
Question 198
jamb 2022
Which process separates a solid from a liquid using a filter paper?
Asublimation
Bcrystallisation
Cdistillation
Dfiltration
Question 199
jamb 2022
The formula of sulphuric acid is
ASO???
BH???SO???
CH???SO???
DH???S
Question 200
jamb 2022
The atomic number of an element is the number of
Aprotons
Bnucleons
Celectrons + neutrons
Dneutrons
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