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.
simple salt
acid salts
anhydrous salts
double salts
basic salts
Correct answer is D
No explanation has been provided for this answer.
an acidic oxide
a basic oxide
a reducing agent
a weak base
an oxidizing agent
Correct answer is C
No explanation has been provided for this answer.
A positive brown ring test indicates the presence of
NO 3
Fe 3+
SO 2-3
CU+
NO- 2
Correct answer is A
Brown ring test is used for the detection of nitrate ions in a solution. As the name suggests it detects presence of nitrate ions by formation of brown ring
The most suitable method for preparing lead (ll) chloride is by
action of dilute HCI on PbSO 4
acts of dilute HCI on lead
action of dilute HCI on PbCO3
bubbling chlorine into a solution of Pb(NO3)2
mixing aqueous solutions Pb(NO3)2 and NaCI.
Correct answer is E
No explanation has been provided for this answer.
NH+4
O 2-
HCI
H3O+
HNO3
Correct answer is D
No explanation has been provided for this answer.
IS NOT CORROSIVE
IS SLIGHTLY IONIZIED IN WATER
DOES NOT PRODUCE SALTS WITH ALKALIS
DOES NOT CONDUCT AN ELECTRIC CURRENT IN AQUEOUS SOLUTION
FORMS ACID SALTS WITH BASES
Correct answer is B
No explanation has been provided for this answer.
What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]
88.9%
80.0%
66.7%
20.0%
11.1%
Correct answer is A
No explanation has been provided for this answer.
Which of the following cannot be deduced from the electronic configuration of a transition metal?
Possession of magnetic property
Ability to form complex ions
Position in the Periodic Table
Variable oxidation states
Physical properties of the metal
Correct answer is A
No explanation has been provided for this answer.
Which of the following molecules is linear in shape?
CH4
H2O
NH3
H2S
CI2
Correct answer is E
No explanation has been provided for this answer.
If a solid has a low melting point and dissolves readily in benzene, it would probably
contain strong electrostatic forces of attraction
conduct electricity in the molten state
dissolve in water
have covalent bonding
absorb moisture on exposure to air
Correct answer is D
No explanation has been provided for this answer.
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