The main reason we cool slowly when recrystallizing is: A. To form large crystal

Question

The main reason we cool slowly when recrystallizing is: A. To form large crystals that are easily filtered. B. To ensure that we do not break glassware due to abrupt thermal changes. C. To allow the molecules to relax into the ground state before crystallizing D. To avoid spontaneous, instantaneous crystallization E. To allow solvent and solute molecules enough time to move away from each other Molecules having the same chemical formula yet different chemical structures are known as: A. Isotopes B. Molecular pairs C. Intermediates D. Chemical partners E. Isomers Which of the following pairs is not an example of constitutional isomerism? A) 2-propanol/2-propanone B) Isoheptane/3-methylhexane C) tert-Butyl alcohol/Isobutanol D) 2, 2-dimethylpropane/1-methylbutane E. 2, 2, 3-trimethylbutane/3, 3-dimethylpentane

Explanation / Answer

Ans 9. A . To form large crystals that are easily filtered .

Its a technique through which the chemicals can be purified. The slow cooling of the solution enables the formation of large crystals as the solubility of it decreases in the chemical . Rapid cooling causes to form impure crystals that traps the impurities within it .

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