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.
In a saturated solution at a given temperature, the undissolved solutes are in equilibrium with
the solvent
dissolved solute particles
the saturated solution
insoluble solute particles
Correct answer is C
A solution that is in equilibrium with undissolved solute is said to be saturated.
Graphite and Diamond are similar in that they
have octahedral shape
have same density
form carbon(IV) oxide on combustion
conduct electricity
Correct answer is C
A diamond is pure carbon. Graphite is pure carbon. Both will burn to form carbon dioxide.
1000.00
100.00
10.00
0.01
Correct answer is D
Dilution factor = molarconc.ofdilutedmolarconc.ofundiluted
= 0.0010.1=0.01
Which of the following statements about endothermic reaction is correct?
Activation energy is high
A catalyst is required
It occurs reversibly
Heat energy is absorbed
Correct answer is D
Endothermic reactions are those reactions which absorb energy from the surroundings and result in a net decrease in temperature.
The use of diamond in abrasives is due to its
high melting point
hardness
octahedral shape
durability
Correct answer is B
Diamonds are very hard, they are often used as an abrasive.