Organic Chemistry Some Basic Principles and Techniques NEET PYQs (1993–2026)

Solved Organic Chemistry Some Basic Principles and Techniques PYQs

3 recent questions with answers. The full set of 115 is free to practise.

1. NEET 2026MediumDiazonium Salts
   Q1

   The major product Z formed in the following sequence of reactions is C₂H₆ →[Cl₂/UV light] (monochlorinated product) X →[NH₃] Y →[(i) NaNO₂] Z

   • AC₂H₅NO₂
   • BC₂H₅N=N-OH
   • CC₂H₅OH
   • DC₂H₅NH₂

   Show answer & solution

   Correct answer: (C)

   Ethane chlorination gives chloroethane (X). Reaction with NH₃ gives ethylamine (Y). Diazotisation with NaNO₂ gives ethanol (Z) via diazonium salt.
2. NEET 2026EasyQualitative & Quantitative Analysis
   Q2

   During Lassaigne's test, the elements present in an organic compound are converted from:

   • AIonic form to ionic form
   • BCovalent form to ionic form
   • CCovalent form to covalent form
   • DIonic form to covalent form

   Show answer & solution

   Correct answer: (B)

   In Lassaigne's test, covalent compounds are fused with sodium metal to convert elements into ionic forms (NaX, NaCN, Na₂S).
3. NEET 2024HardPurification Techniques
   Q3

   A steam volatile organic compound which is immiscible with water has a boiling point of $250^{\circ }C$. During steam distillation, a mixture of this
   
   organic compound and water will boil :
   
   [NEET 2024 Re ]

   • Aabove $100^{\circ }C$ but below $250^{\circ }C$
   • Babove $250^{\circ }C$
   • Cat $250^{\circ }C$
   • Dclose to but below $100^{\circ }C$

   Show answer & solution

   Correct answer: (D)

   If one of the substances in the mixture is water and the other, a water insoluble substance, then the mixture will boil close to but below, $373K\left(100^{\circ }C\right)$.

Topic-wise question count

Where NEET has asked from Organic Chemistry Some Basic Principles and Techniques, most frequent first.

• Electronic Effects29
• Reactive Intermediates26
• IUPAC Nomenclature20
• Isomerism19
• Qualitative & Quantitative Analysis12
• Purification Techniques7
• Amines and Preparation Methods1
• Diazonium Salts1

Year-wise Organic Chemistry Some Basic Principles and Techniques questions in NEET

Number of questions from this chapter in each year's paper(s).