During the process of crystallization, the hot saturated solution:
Correct answer: B. Is cooled at a moderated rate to get medium-sized crystals
- A. Is cooled very slowly to get large-size pores in it
- B. Is cooled at a moderated rate to get medium-sized crystals
- C. Is evaporated to get the crystals of the product
- D. Is mixed with an immiscible liquid to get the pure crystals of the product
Explanation
The hot filtered solution is cooled at a moderate rate so that medium sized crystals are formed. Slow cooling yields bigger crystals which are likely to include considerable amount of solvent carrying impurities with it and complicating the drying process.
Last updated
About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
Practise Experimental Techniques in Chemistry
79 free Experimental Techniques in Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Which of the following techniques is used for the separation of insoluble Particlesfrom liquids?
Which of the following ways is used for classification of chromatography?
substance having very high vapour pressure at its melting point, on heatingwill show
Branch of chemistry that deals with e complete qualitative and quantitaive analysis of a substance
Rate of filtration can be increased by applying gentle suction