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.
H2S
Ag2S
PbS
HNO3
S
Correct answer is B
No explanation has been provided for this answer.
X2O
XO
XO2
X2O3
X3O4
Correct answer is B
No explanation has been provided for this answer.
In the chemical reaction A + B \(\to\) C + D, more of D is formed?
if the concentrated of A is reduced
if the concentrated of B is reduced
if the concentrated of C is reduced
if the concentration of C is increased
if D is continuously removed from the reaction mixture
Correct answer is E
No explanation has been provided for this answer.
In the reaction N2(g) + O(g)
↔ 2NO(g) produced i an increase in the total pressure will?
cause less nitrogen to be produced in the equilibrium mixture
cause less nitric oxide to be produced in the equilibrium mixture
cause more nitric oxide to be produced in the equilibrium mixture
cause more oxygen to be produced in the equilibrium mixture
have no effect
Correct answer is E
If the pressure is increased, the position of equilibrium. moves in the direction of the fewest moles. of gas
However, because there is an equal number of particles on both sides, change in pressure will have no effect on the system.
Which of the following CANNOT be obtained by fractional distillation of petroleum?
Ether
Methane
Butane
Ethene
Hydrogen
Correct answer is E
The fractional distillation of crude oil gives several products in liquid and gaseous forms. The products that are in the gaseous form include petroleum gas or LPG (liquefied petroleum gas) e.g. methane, ethane, propane, butane, propylene, butylene, propane, etc.
Therefore the answer to this question is hydrogen.