NEET Practice Questions (MCQs) with Answers & Solutions

Distillation is a technique of purification of organic compounds. It involves heating a liquid to create vapor and then condensing the vapor back into a liquid. This method is commonly used to separate mixtures based on differences in their boiling points.

Both chromatography and spectroscopy are methods used to check the purity of organic compounds. Chromatography separates components of a mixture based on their movement through a stationary phase, while spectroscopy analyzes the interaction of light with the sample to identify and quantify the compounds present.

The empirical formula represents the simplest whole-number ratio of atoms of different elements in a molecule. For example, the empirical formula of hydrogen peroxide (Hâ‚‚Oâ‚‚) is HO, which indicates the simplest ratio of hydrogen to oxygen is 1:1.

Crystallization is a purification technique based on the difference in the solubilities of the compound and the impurities in a given solvent. During crystallization, the desired compound forms solid crystals from a solution, leaving impurities in the solution.

For effective crystallization, the solvent should exhibit two main properties: the impure compound should be sparingly soluble in it at room temperature and appreciably soluble at higher temperatures. This ensures that upon cooling, the pure compound crystallizes out, leaving impurities in the solution.

Distillation is useful for separating liquids with a significant difference in their boiling points. This method relies on heating the mixture to vaporize the more volatile component, which is then condensed back into a liquid in a separate container.