MCQOPTIONS

Explore topic-wise MCQs in Chemistry.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.	Which of the following conditions are satisfied when the cell reaction in the electrochemical cell is spontaneous?
A.	G > 0
B.	E <sub>cell</sub> < 0
C.	E <sub>cell</sub> = 0
D.	G < 0
Answer» E.

2.	What is the observation when the opposing external applied potential to an electrochemical cell is greater than the cell s potential?
A.	The electrochemical cell behaves like an electrolytic cell
B.	The electrochemical cell stops functioning
C.	Only oxidation reactions occur in the cell
D.	Only reduction reactions occur in the cell
Answer» B. The electrochemical cell stops functioning

3.	Which of the following statements regarding primary cells is false?
A.	Primary cells cannot be recharged
B.	They have low internal resistance
C.	They have an irreversible chemical reaction
D.	Their initial cost is cheap
Answer» C. They have an irreversible chemical reaction

4.	Which of the following is a not a secondary cell?
A.	Nickel-cadmium cell
B.	Lead storage cell
C.	Mercury cell
D.	Leclanche cell
Answer» E.

5.	What is the direction of flow of electrons in an electrolytic cell?
A.	Anode to cathode externally
B.	Anode to cathode internally
C.	Cathode to anode externally
D.	Cathode to anode in the solution
Answer» B. Anode to cathode internally

6.	Which of the following is not a type of electrochemical cell?
A.	Voltaic cell
B.	Photovoltaic cell
C.	Electrolytic cell
D.	Fuel Cell
Answer» C. Electrolytic cell

7.	Which of the following is not a characteristic feature of a salt bridge?
A.	Salt bridge joins the two halves of an electrochemical cell
B.	It completes the inner circuit
C.	It is filled with a salt solution (or gel)
D.	It does not maintain electrical neutrality of the electrolytic solutions of the half-cells
Answer» E.

8.	Why are the saturated solutions of electrolytes for the salt bridge prepared in agar-agar jelly or gelatin?
A.	The jelly acts as an electrolyte
B.	It helps the electrolytes to mix with the contents of the half cells
C.	It helps maintain the electrical polarity between the two half-cell solutions
D.	It keeps the electrolyte in semi-solid phase and prevents it from mixing with the two half-cell solutions
Answer» E.

9.	Which of the following factors does not affect the electrode potential of an electrode?
A.	Nature of the electrode (metal)
B.	Temperature of the solution
C.	Molarity of the solution
D.	Size of the electrode
Answer» E.

10.	Which of the following statements is correct regarding Electrochemical cells?
A.	Cell potential is an extensive property
B.	Cell potential is an intensive property
C.	The Gibbs free energy of an electrochemical cell is an intensive property
D.	Gibbs free energy is undefined for an electrochemical cell
Answer» C. The Gibbs free energy of an electrochemical cell is an intensive property

11.	When no current is drawn through an electrochemical cell, the sum of the electrode potentials of the two electrodes is called cell emf. True or False?
A.	True
B.	False
Answer» B. False

12.	Which of the following is not a generally used electrolyte in the salt bridges used to connect the two half-cells of an electrochemical cell?
A.	NaCl
B.	KNO<sub>3</sub>
C.	KCl
D.	ZnSO<sub>4</sub>
Answer» E.

13.	When equilibrium is reached inside the two half-cells of the electrochemical cells, what is the net voltage across the electrodes?
A.	> 1
B.	< 1
C.	= 0
D.	Not defined
Answer» D. Not defined

14.	An electrochemical cell generally consists of a cathode and an anode. Which of the following statements is correct with respect to the cathode?
A.	Oxidation occurs at the cathode
B.	Electrons move into the cathode
C.	Usually denoted by a negative sign
D.	Is usually made up of insulating material
Answer» C. Usually denoted by a negative sign

15.	An electrochemical cell can only convert electrical energy to chemical energy.
A.	True
B.	False
Answer» C.