Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
How many electrons are present in \(^9_4Be^{2+}\)?
2
4
5
6
Correct answer is A
Neutral Be has 4 electrons but \(Be^{2+}\) means it has lost two electrons from possible four and became a positive ion.
\(\therefore\) the number of electrons left will be equal to two.
136X
137X
196X
197X
Correct answer is A
No explanation has been provided for this answer.
The following atoms of carbon 126C, 136C and 146C can be described as?
Allotropes
Isomers
Isotopes
Isotones
Correct answer is C
No explanation has been provided for this answer.
Increase the reactant production
Increase the value of the equilibrium constant
Shift the equilibrium to the left
Decrease the value of the equilibrium constant
Correct answer is B
No explanation has been provided for this answer.
Concentration
Catalyst
Temperature
Light
Correct answer is D
No explanation has been provided for this answer.
From the diagram above, an ideal gas can be represented by
K
M
L
N
Correct answer is D
see diagram in textbook
The curve depicts titration between a strong acid of pH
Strong acid and strong base
Strong acid and weak base
Weak acid and weak base
Weak acid and strong base
Correct answer is B
No explanation has been provided for this answer.
In the diagram above, X is the
Enthalphy
Activated complex
Activation energy
Enthalphy change
Correct answer is D
No explanation has been provided for this answer.
The functional groups present in the compound above are
Alkene and halo-group
Hydroxyl and chloro-group
Alkene and chloro-group
Hydroxyl and halo-group
Correct answer is D
No explanation has been provided for this answer.
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