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 standard conditions is not correct about energy changes?
Standard temperature is 298K
Standard pressure is 1 atm
Concentration of solution must be 1 mol/dm\(^3\)
ΔH at 298 K is the activation energy
Correct answer is D
The standard conditions of 1 atm pressure and 298K.
I and II only
I and III only
II and IIl only
I, II and III
Correct answer is B
Which of the following statements is correet for a reaction at equilibrium?
All reactions cease to occur
The eaction has gone to completion
The rates of the forward and backward reactions are equal
The amount of product equals the amount of reactants
Correct answer is C
In a chemical reaction, chemical equilibrium is the state in which the forward reaction rate and the reverse reaction rate are equal. The result of this equilibrium is that the concentrations of the reactants and the products do not change.
Which of the following substances is not a reducing agent?
C
CO
O\(_2\)
H\(_2\)
Correct answer is C
- A reducing agent is oxidized, because it loses electrons in the redox reaction. - Elemental oxygen is a strong oxidizing agent.
I only
I and II only
Il and IIl only
I and Ill only
Correct answer is B
No explanation has been provided for this answer.