Question

Which of the following two reagents are used in the test for the differentiation between Bhang, Ganja and Charas ? A. Duquenois reagent
B. p-Aminophenol in ethanol
C. Fast blue B salt with anhydrous sodium sulphate
D. Caustic potash in distilled water
Choose the correct answer from the options given below :

• A. A and C Only
• B. B and C Only
• C. B and D Only
• D. A and D Only

Hint:

Cannabis test → Duquenois + Fast Blue B are key reagents.

Answer 1

The Correct Option is A

Concept: Cannabis products such as bhang, ganja, and charas are differentiated using specific chemical color tests in forensic analysis.

Step 1: Duquenois reagent (A).
This is a classical color test used for identifying cannabinoids present in cannabis samples.
Thus, A is correct.

Step 2: Fast Blue B salt (C).
Fast Blue B reagent reacts with cannabinoids to produce characteristic color changes and is used in differentiation.
Thus, C is correct.

Step 3: Evaluating other reagents.

• p-Aminophenol → Not standard for cannabis differentiation

• Caustic potash → General reagent, not specific for this test

Step 4: Final evaluation.
Thus, correct reagents are A and C. Final Conclusion:
Hence, the correct answer is option (1).