Chemistry MCQs for NEET — Practice Questions with Answers

$ Ar_{18} \rightarrow 2, 8, 8 $

$ Ne_{10} \rightarrow 1S^2, 2S^2 2P^6 $

He is least polarizable bec. Of small size.

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.