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Chemistry
UTME / JAMB 2022
Organic Chemistry
Solution
An organic compound which decolorizes bromine water is likely to be?
A
C\(_3\)H\(_8\)
B
C\(_2\)H\(_6\)
C
C\(_4\)H\(_10\)
D
C\(_2\)H\(_4\)
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Matter & Separation Techniques
Solution
Which one of the following is not a mixture?
A
Air
B
Mercury
C
Milk
D
Cement
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Matter & Separation Techniques
Solution
Oxygen is absent in?
A
Kerosene
B
Soil
C
Glass
D
Cement
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Matter & Separation Techniques
Solution
A sample of any of the following substances disappears after some time when exposed to air like camphor, naphthalene, or dry ice. This phenomenon is called?
A
Sublimation
B
Evaporation
C
Diffusion
D
Radiation
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The atomic weight of nitrogen is?
A
10
B
12
C
14
D
16
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The maximum electron in N shell is?
A
2
B
8
C
18
D
32
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The mass number of a nucleus is?
A
Always less than its atomic number
B
The sum of the number of protons and neutrons present in the nucleus
C
Always more than the atomic weight
D
A fraction
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The mass of one Avogadro number of helium atoms is?
A
1.00gram
B
4.00gram
C
8.00gram
D
6.00gram
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
220g of carbon dioxide contains ----- moles
A
5
B
6
C
3
D
4
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The nucleus of an atom consists of?
A
Electrons and neutrons
B
Electrons and protons
C
Protons and neutrons
D
None of the above
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Basic Chemistry
Solution
The process by which salt and water reacted in a limited way to form an acid or a base is?
A
Neutral process
B
Basic acidic process
C
Hydrolysis
D
Sublimation
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2021
Basic Chemistry
Solution
The Bohr model of the atom proposed the existence of?
A
the nucleus
B
electron shells
C
nucleons
D
neutrons
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2021
Acids, Bases, and Salts
Solution
The basic property of salts used as drying agents is by?
A
efforescence
B
high melting point
C
hygroscopy
D
low solubility
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
The most abundant rare gas in the atmosphere is?
A
He
B
Ne
C
Ar
D
Xe
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
An element having the atomic number 17 will resemble which of the following elements having atomic number as given below?
A
33
B
35
C
18
D
19
medium Difficulty
Study Explanation