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.
Which of the following raw materials is used in the plastic industry ?
Calcium
Ethene
Hydrogen
Methane
Correct answer is B
No explanation has been provided for this answer.
The separation of petroleum fractions depends on the differences in their
boiling points
molar masses
melting point
solubilities
Correct answer is A
No explanation has been provided for this answer.
Which of the following oxides of nitrogen has oxidation number of + 1?
KNO3
N2O
N2O3
NO
Correct answer is B
No explanation has been provided for this answer.
a catalyst
an oxidizing agent
a reducing agent
a sulphonating agent
Correct answer is B
No explanation has been provided for this answer.
Which of the following substances is the anode in the dry Leclanche cell ?
Carbon rod
Muslin bag
The seal
Zinc container
Correct answer is D
In a Leclanche cell, the anode is a zinc rod / container and the cathode is a carbon rod with ammonium chloride solution / paste as the electrolyte.
l and ll only
ll, lll and IV only
l, ll and lll only
l, ll, lll and IV
Correct answer is B
No explanation has been provided for this answer.
A catalyst increases the rate of chemical reaction by
decreasing the temperature of the reaction
decreasing the activation energy of the reaction
increasing the surface area of the reactants
decreasing the surface area of the products
Correct answer is B
No explanation has been provided for this answer.
Which of the following statement is correct? The solubility of
gases increases with increase in temperature
gases decreases with increase in temperature
most solid solutes decreases with indease in temperature
most solid solutes is constant
Correct answer is B
No explanation has been provided for this answer.
Which of the following salts is insoluble in water?
Pb (NO3)2
Na 2CO3
AgNO3
AgCI
Correct answer is D
No explanation has been provided for this answer.
A solution that contains as much solute as it can dissolve at a given temperature is said to be
concentrated
saturated
supersaturated
unsaturated
Correct answer is B
No explanation has been provided for this answer.
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