300+ TOP MCQs on Cell Constant and Electrochemical Cells and Answers

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Cell Constant and Electrochemical Cells Multiple Choice Questions

MCQs on Cell Constant and Electrochemical Cells :

1. Oxygen has a +2 oxidation state in
(A) H2O
(B) H2O2
(C) F2O
(D) SO2

Answer

Answer: (c)

2. Which of the following is the strongest reducing agent?
(A) Li
(B) Na
(C) Mg
(D) Ca

Answer

Answer: (a)

3. When the salt bridge is removed from a cell, its voltage
(A) will increase
(B) will decrease to half
(C) will decrease to zero
(D) will not change

Answer

Answer: (c)

4. When a dilute solution of H2SO4 is electrolysed using a platinum electrode, at anode the gas evolved is
(A) SO3
(B) SO2
(C) H2
(D) O2

Answer

Answer: (d)

5. The oxidation number of sulphur in Caro’s acid is
(A) +4
(B) +5
(C) +6
(D) +8

Answer

Answer: (c)

6. Which of the following is the most powerful reducing agent?
(A) H2S
(B) H2SO3
(C) SnCl2
(D) HNO2

Answer

Answer: (a)

7. Which of the following substances can act as both oxidising and reducing agent?
(A) KMnO4
(B) K2Cr2O7
(C) HNO3
(D) H2O2

Answer

Answer: (d)

8. Electrolytes conduct electric current
(A) by the movement of ions
(B) by the movement of atoms
(C) by the movement of molecules
(D) by the movement of electrons from the cathode to anode

Answer

Answer: (d)

9. The reductant may be defined as a substance, whose oxidation no of the atom
(A) increases
(B) decreases
(C) remains constant
(D) may increases or decreases

Answer

Answer: (a)

10. Which of the following is not an example of an oxidizing agent?
(A) hydrogen peroxide
(B) potassium dichromate
(C) nitric acid
(D) hydrogen sulphide

Answer

Answer: (d)

11. The conductance in electrolyte conductors is due to
(A) Either movement of electrons or ions
(B) The flow of free mobile electrons
(C) Movement of ions
(D) None of the above

Answer

Answer: (c)

12. The cell constant of a conductivity cell
(A) Changes with a change of concentration of electrolyte
(B) Remains constant for a cell
(C) changes with a change of electrolyte
(D) changes with change in temperature

Answer

Answer: (b)

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