jee_main_2025_02_april_evening - Organic Chemistry - Some Basic Principles and Techniques Topics

Master these core formulas and structures to solve almost any past paper question.

Sample Questions in this Chapter

QUESTION #0 Hybridization in Organic Compounds
In 3, 3-dimethylhex-1-ene-4-yne, there are sp³, sp² and sp hybridised carbon atoms respectively:
Start Practice →
QUESTION #0 Methods of Purification of Organic Compounds
Match List-I with List-II: array|l|l| arrayc List-I (Purification technique) array & arrayc List-II (Mixture of organic compounds) array (A) Distillation (simple) & (I) Diesel + Petrol (B) Fractional distillation & (II) Aniline + Water (C) Distillation under reduced pressure & (III) Chloroform + Aniline (D) Steam distillation & (IV) Glycerol + Spent-lye array Choose the correct answer from the options given below:
Start Practice →
QUESTION #0 Quantitative Estimation (Dumas Method)
In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60~mL of nitrogen collected at 300K temperature and 715~mmHg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at 300K = 15~mmHg) is
Start Practice →
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%)

Select Your Target Exam

Choose an exam track below to find formulas per chapter and patterns.

Syncing Exam Intelligence

Mapping formulas and patterns across all tracks…

PATH A — FULL LENGTH PRACTICE

Full Mock Test Hub

Simulate real NTA exam conditions with fully tracked mocks. Time yourself against past papers.

Now Live Open
PATH B — TARGETED PRACTICE

Topic-wise Practice Hub

Practice past-year questions one chapter at a time. Pick an exam → subject → chapter and get every PYQ for that topic — pulled together from all past papers — with the chapter's key formulas alongside.

Loading Questions... Browse Topics

Exam Analysis Tools

Chapter weightage trends and topic-wise practice — all mapped from past shift papers.

Year-wise PYQ

Chapter Weightage & Trends

See high-yield chapters, year-wise counts and the frequency-based chance each topic repeats next exam.

Weightage Board Open
Targeted PYQs

Topic-wise Practice Hub

Every past-year question for a chapter pulled from all papers, with its key formulas alongside.

One chapter at a time Open
Latest from the Blog
View all →

Loading articles...