NEET · Chemistry —

Purification and Characterisation of Organic Compounds appeared 2 times across 1 year — 4.4% of Chemistry. This question is from Separation Techniques.

Year 2024 Total
Questions 2 2
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Two products X and Y are formed in the following reaction sequence:
Reaction sequence diagram for Q58 - JEE Main 2026 Morning
Sequence showing alkylation of benzene followed by nitration to form ortho and para nitrotoluenes.
The suitable method that can be used for the separation of products X and Y is:

Solution & Explanation

Related Formula
Boiling Point Difference arrow Fractional Distillation
Core Logic

Friedel-Crafts reaction gives toluene (W). Nitration of toluene produces o-nitrotoluene (X, B.P. 222^° C) and p-nitrotoluene (Y, B.P. 238^° C). Due to close boiling points, fractional distillation is used for separation.

Step 1: Conclusion

Fractional distillation (Option 3) is the suitable method.

Pattern Recognition

Ortho and para isomers with significant boiling point differences are separated by fractional distillation.

Chapter Mix

Class 11 Chemistry: Purification and Characterisation of Organic Compounds

Solution diagram showing nitrotoluene structures
Sequence showing alkylation of benzene followed by nitration to form ortho and para nitrotoluenes.

Reference Study Guides

Purification And Characterisation Of Organic Compounds

More Purification and Characterisation of Organic Compounds Previous-Year Questions

Q64 neet_2024_05_may_morning Lassaigne's Test Principles
During Lassaigne's test, the elements present in an organic compound are converted from:
  • A. (1) Covalent form to covalent form
  • B. (2) Ionic form to ionic form
  • C. (3) Covalent form to ionic form
  • D. (4) Ionic form to covalent form

Solution

Related Formula
Na + C + N Δ NaCN (Ionic salt)
Core Logic

Sodium fusion converts covalently bonded elements (N, S, X) in organic compounds into water-soluble ionic sodium salts (NaCN, Na₂S, NaX).

Step 1: Conclusion

Conversion is from covalent form to ionic form (Option 3).

Pattern Recognition

Sodium fusion extract transforms covalent organic bonds to ionic inorganic salts.

Chapter Mix

Class 11 Chemistry: Purification and Characterisation of Organic Compounds

More Purification and Characterisation of Organic Compounds Questions — neet_2024_05_may_morning

Practice all Purification and Characterisation of Organic Compounds previous-year questions →

Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)