Practice free Purification and Characteristics of Organic Compounds (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as:
Direct solid → vapour transition is sublimation.
Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.
A. $Al^{3+}$ B. $Cu^{2+}$ C. $Ba^{2+}$ D. $Co^{2+}$ E. $Mg^{2+}$
Choose the correct answer from the options given below:
Cu²⁺ Gr II → Al³⁺ Gr III → Co²⁺ Gr IV → Ba²⁺ Gr V → Mg²⁺ Gr VI.
Match List I with List II:
List I (Mixture) — A. CHCl₃ + C₆H₅NH₂, B. Crude oil in petroleum industry, C. Glycerol from spent-lye, D. Aniline - water
List II (Method of Separation) — I. Distillation under reduced pressure, II. Steam distillation, III. Fractional distillation, IV. Simple distillation
Choose the correct answer:
CHCl₃ + aniline (large bp difference) → simple distillation (IV); crude oil → fractional (III); glycerol from spent-lye → distillation under reduced pressure (I); aniline–water → steam distillation (II).
Which one of the following reactions does NOT belong to "Lassaigne's test"?
Lassaigne's test detects N, S and halogens by fusion with sodium. The reduction of CuO by carbon is a combustion-based carbon detection, not part of Lassaigne's test.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Purification and Characteristics of Organic Compounds question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.