QUESTIONS AND ANSWERS 2026
- 2027
B
Which statement is correct for the reaction below under standard
conditions?
2Cl2 (g) + 2NO (g) --> N2 (g) + 2Cl2O (g)
Delta H` = -22.0 kJ/mol
(A) The reaction is spontaneous at all temperatures.
(B) The reaction is spontaneous only at low temperatures.
(C) The reaction is spontaneous only at high temperatures.
(D) The reaction is not spontaneous at any temperature.
C
For a reaction where K > 1 at all temperatures, which statement(s)
must be true?
(A) Only I
(B) Only III
(C) Both I and II
(D) Both I and III
C
,What is the coefficient for the nitrate ion (NO2^-) when the redox
reaction is balanced in basic solution?
MnO4^- (aq) + NO2^- (aq) -> MnO2 (s) + NO3^- (aq)
(A) 1
(B) 2
(C) 3
(D) 4
C
A spontaneous electrochemical cell is set up as shown. Which
statement is true?
Sn^(2+) + 2e^(-) --> Sn
E` = -0.136 V
Fe^(3+) + 3e^(-) --> Fe
E` = -0.036 V
(A) The tin electrode is the cathode and electrons move from left to
right.
(B) The tin electrode is the cathode and electrons move from right to
left.
(C) The tin electrode is the anode and electrons move from left to
right.
, (D) The tin electrode is the anode and electrons move from right to
left.
B
Given the standard reduction potentials at 25 degrees C, what is the
standard cell potential of a
Ni (s) | Ni^(2+) (aq) || Ag^(+) (aq) | Ag (s) galvanic cell?
(A) 0.56 V
(B) 1.02 V
(C) 1.35 V
(D) 1.81 V
B
An oxidation-reduction reaction in which 3 electrons are transferred
has a Delta G` = 18.55 kJ/mol at 25 degrees C. What is the value of
E`?
(A) 0.192 V
(B) -0.064 V
(C) -0.192 V
(D) -0.577 V
B
Consider the reaction.
Cu^(2+) (aq) + Fe (s) --> Cu (s) + Fe^(2+) (aq)
E` = 0.78 V