Question

Which of the following reagent is not use in qualitative and quantitative chemical analysis?

• A. EDTA
• B. Cupron
• C. DMG
• D. D-penicillamine

Hint:

Remember some famous analytical reagents: EDTA for complexometric titration, DMG for nickel detection, and Cupron for metal analysis. If an option is more common in medicinal chemistry, it is less likely to be a routine analytical reagent.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Analytical reagents are used to detect (qualitative) or measure (quantitative) metal ions in a sample.
Step 2: Formula Application:
1. EDTA: Used in complexometric titrations for water hardness ($Ca^{2+}$, $Mg^{2+}$). 2. DMG (Dimethylglyoxime): Used to detect $Ni^{2+}$. 3. Cupron (Benzoin oxime): Used to detect Copper.
Step 3: Explanation:
D-penicillamine is a chelating agent, but it is primarily used in medicine to treat Wilson's disease (copper poisoning) or lead poisoning, rather than as a standard laboratory reagent for chemical analysis.
Step 4: Final Answer:
D-penicillamine is the reagent not used in standard chemical analysis.