Virtual Labs

Heavy metal analysis using Differential Pulse Voltammetry (DPV) and Square Wave Voltammetry (SWV) Techniques.

Q1. In an electrochemical cell, which of the following current is present even in the absence of the analyte?

a: Faradaic current. Explanation

Explanation

b: Residual current. Explanation

Explanation

c: Cathodic current. Explanation

Explanation

d: Anodic current. Explanation

Explanation

Q2. In differential pulse voltammetry, the graph is obtained by plotting ____________.

a: The potential difference as a function of current. Explanation

Explanation

b: The current difference as a function of potential. Explanation

Explanation

c: The potential difference as a function of time. Explanation

Explanation

d: The current difference as a function of time. Explanation

Explanation

Q3. What is the range of frequency of square wave voltammetry?

a: 1-125 Hz Explanation

Explanation

b: 50-100 Hz Explanation

Explanation

c: 10-150 Hz Explanation

Explanation

d: 10-200 Hz Explanation

Explanation

Q4. The potential at i _1/2 is called ______________.

a: Middle potential. Explanation

Explanation

b: Overpotential. Explanation

Explanation

c: Reference potential. Explanation

Explanation

d: Half-wave potential. Explanation

Explanation

Q5. Which of the following voltammetric technique enhances the sensitivity by improving the faradic current?

a: Anodic stripping voltammetry Explanation

Explanation

b: Cyclic voltammetry Explanation

Explanation

c: Differential pulse voltammetry Explanation

Explanation

d: Square wave voltammetry Explanation

Explanation

Q6. Differential pulse voltammetry helps to ___________ the effect of background charging current during analysis?

a: Minimize Explanation

Explanation

b: Maximize Explanation

Explanation

c: Fluctuate Explanation

Explanation

d: The detection limit is about 10^-8M Explanation

Explanation

Q7. Which of the following is an example of a non-faradaic current?

a: Charging current Explanation

Explanation

b: Cathodic current Explanation

Explanation

c: Anodic current Explanation

Explanation

d: Residual current Explanation

Explanation

Q8.Which of the following is not a feature of square wave voltammetry?

a: Mechanistic and kinetic studies Explanation

Explanation

b: Quantitative chemical analysis Explanation

Explanation

c: Qualitative identification of phases Explanation

Explanation

d: Non-toxic property Explanation

Explanation