Electrochemistry Practice Questions
NEET · Chemistry · 1590 free MCQs with instant results and detailed explanations.
1590
Total
364
Easy
688
Medium
538
Hard
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Topics in Electrochemistry
Conductance
348
Faraday's Laws
250
Galvanic Cells
302
Nernst Equation
322
Corrosion
368
Sample Questions from Electrochemistry
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary function of a galvanic cell?
A.
To convert chemical energy into electrical energy
B.
To convert electrical energy into chemical energy
C.
To measure voltage
D.
To conduct thermal energy
Show Answer & Explanation
Correct Answer: A
A galvanic cell converts chemical energy from spontaneous redox reactions into electrical energy, which is its primary function.
Q2
Easy
In a galvanic cell, which of the following occurs at the cathode?
A.
Oxidation
B.
Reduction
C.
Neither oxidation nor reduction
D.
Electron loss
Show Answer & Explanation
Correct Answer: B
Reduction occurs at the cathode where electrons are gained, contrasting with oxidation that occurs at the anode.
Q3
Easy
Which metal is commonly used in the anode of a galvanic cell?
A.
Copper
B.
Zinc
C.
Silver
D.
Gold
Show Answer & Explanation
Correct Answer: B
Zinc is often used as the anode in galvanic cells due to its tendency to oxidize easily, providing electrons.
Q4
Medium
In a galvanic cell, which of the following statements is true regarding the anode and cathode?
A.
The anode is negatively charged and the cathode is positively charged.
B.
Both the anode and cathode are negatively charged.
C.
The anode is positively charged and the cathode is negatively charged.
D.
The anode and cathode have the same charge.
Show Answer & Explanation
Correct Answer: A
In a galvanic cell, oxidation occurs at the anode, which has a higher potential energy and is negatively charged. The cathode, where reduction occurs, is positively charged. Thus, option A is correct.
Q5
Medium
A galvanic cell consists of a Zn electrode in a ZnSO4 solution and a Cu electrode in a CuSO4 solution. If the standard reduction potentials are +0.34 V for Cu²⁺/Cu and -0.76 V for Zn²⁺/Zn, what is the cell potential (E°) at standard conditions?
A.
1.10 V
B.
0.76 V
C.
0.34 V
D.
0.42 V
Show Answer & Explanation
Correct Answer: A
The cell potential E° can be calculated as E°cell = E°cathode - E°anode. Here, E°cell = 0.34 V - (-0.76 V) = 1.10 V. Thus, the correct answer is A.
Q6
Medium
Which of the following factors does NOT affect the electromotive force (emf) of a galvanic cell?
A.
Concentration of reactants and products
B.
Temperature
C.
Volume of electrolyte
D.
Nature of the electrodes
Show Answer & Explanation
Correct Answer: C
The emf of a galvanic cell is influenced by the concentration of reactants/products, temperature, and the nature of the electrodes, but the volume of the electrolyte does not directly affect the emf. Therefore, C is the correct answer.
Q7
Medium
In a galvanic cell, if the concentration of the Cu²⁺ ions in the cathode half-cell is increased, which of the following will occur?
A.
The cell potential will increase.
B.
The cell potential will decrease.
C.
The cell potential will remain unchanged.
D.
The cell will stop functioning.
Show Answer & Explanation
Correct Answer: A
According to the Nernst equation, if the concentration of Cu²⁺ ions (reactant) in the cathode increases, the cell potential increases, leading to a greater driving force for the reduction reaction. Hence, A is the correct answer.
Q8
Hard
In a galvanic cell, which of the following statements about the salt bridge is TRUE?
A.
It prevents the flow of electrons.
B.
It maintains electrical neutrality.
C.
It directly participates in the redox reaction.
D.
It increases the potential difference.
Show Answer & Explanation
Correct Answer: B
The salt bridge maintains electrical neutrality by allowing the movement of ions, compensating for the charge buildup as reactions occur.
Q9
Hard
A galvanic cell is constructed using the Zn/Zn²⁺ and Cu/Cu²⁺ half-cells. If the concentration of Zn²⁺ is increased, what will happen to the cell potential?
A.
It will increase.
B.
It will decrease.
C.
It will remain the same.
D.
It will fluctuate.
Show Answer & Explanation
Correct Answer: A
Increasing the concentration of Zn²⁺ will shift the equilibrium of the Zn half-cell according to the Nernst equation, resulting in a higher cell potential.
Q10
Hard
Which of the following metal pairs can be used to build a galvanic cell that will produce a potential greater than 1.0 V?
A.
Ag/Ag⁺ and Pb/Pb²⁺
B.
Cu/Cu²⁺ and Zn/Zn²⁺
C.
Fe/Fe²⁺ and Au/Au³⁺
D.
Mg/Mg²⁺ and Ni/Ni²⁺
Show Answer & Explanation
Correct Answer: D
The standard reduction potentials for Mg and Ni indicate a significant difference, generating a cell potential greater than 1.0 V when combined.
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Electrochemistry — NEET Chemistry Practice Questions Online
This page contains 1590 practice MCQs for the chapter Electrochemistry in NEET Chemistry. The questions are organized by difficulty — 364 easy, 688 medium, 538 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.