Question:
Which one of the following is used as a test for aliphatic primary amines?
Which one of the following is used as a test for aliphatic primary amines?
Show Hint
Only primary amines (not secondary or tertiary) give carbylamine test.
Updated On: May 8, 2026
- Tollen's test
- Fehling's test
- Isocyanide test
- Azo dye test
- Phthalein fusion test
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
Aliphatic primary amines give carbylamine (isocyanide) test.
Step 1: Reaction involved. \[ RNH_2 + CHCl_3 + 3KOH \rightarrow RNC + 3KCl + 3H_2O \] Observation: A foul smelling isocyanide is formed.
Step 2: Analyze options.
• Tollen's test → aldehydes
• Fehling's test → aldehydes
• Isocyanide test → primary amines ✓
• Azo dye test → aromatic amines
• Phthalein test → phenols
Step 3: Conclusion. Only isocyanide test specifically identifies aliphatic primary amines. \[ \boxed{\text{Isocyanide test}} \]
Step 1: Reaction involved. \[ RNH_2 + CHCl_3 + 3KOH \rightarrow RNC + 3KCl + 3H_2O \] Observation: A foul smelling isocyanide is formed.
Step 2: Analyze options.
• Tollen's test → aldehydes
• Fehling's test → aldehydes
• Isocyanide test → primary amines ✓
• Azo dye test → aromatic amines
• Phthalein test → phenols
Step 3: Conclusion. Only isocyanide test specifically identifies aliphatic primary amines. \[ \boxed{\text{Isocyanide test}} \]
Was this answer helpful?
0
0
Top KEAM Chemistry Questions
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
- $4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :
- Green chemistry deals with
- Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to
- Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
View More Questions
Top KEAM Structure of Amines Questions
- The order of basic strength of following amines is: (i) \( CH_3NH_2 \) (ii) \( (C_2H_5)_2NH \) (iii) \( C_6H_5NH_2 \) (iv) \( C_6H_5NHCH_3 \)
- Which among the following has least \( \text{p}K_b \) value?
- Which of the following amines does not form carbylamine?
- The increasing order of boiling point of the following amines is
- Which of the following amine does not react with Hinsberg’s reagent?
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions