Organic Chemistry Lab Te\" CHMI 303-001 Fall 2017: Nane: 1. Considke the followi

Question

Organic Chemistry Lab Te" CHMI 303-001 Fall 2017: Nane: 1. Considke the following renction Sor the proparation of cyolohesewe fhom cyrfohesanes HyD The pemerally accepted mechoanism Sor this reaction is 2. In the atvve esperinem (quesion- 1)320-g of syelohesanol was used and 3,3-g of pure product leycldiesene) was obained The % yield is A)26% B)32% C)76% D)89% 3. Aa ocrgmic salvent has i biling psin of 1o c. which of the sSstlow ing heting methods would you recommend foe distiling off this solveat? A) Busen BumerBtWB C) Heating Mantle D) Hot Plate . A student records the meltiag point ots crystalline organic compound as 140°C. What is wrong with àis resul? A) Themometers are not calibrated for such high temperatures B) Organic compounds will decompose af such high temperatures C) The meking point is recorded as an esact value not as a nge D) None of the above 5. Which of the following are INOORRECT criteria in choosing a solvenn for recrystallization ) The boiling poist of the sobvent must be higher then the melting point of the solute II) The solvent you choose must be able to react chemically with the solule III) The solute must be soluble in the solvent when hot, bat insoluble when the soent is cold IV) The solvent should have different dissolving capobilities for the solule and for the impurities, A)I and II B)l and IIl C)ll and IV D) They are allINCORRECT B. Which of the following is (are) likely to oecur if crystallization occurs too rapidly? A) The crysals will be too small to be collected by suction filtration B) Impurities would be trapped along with the desired crystals C) A large amount of solvent molecules will remain in the product making drying difficult D) Noae of the above

Explanation / Answer

1)answer is it follows E1 reaction because it is a week nucleophile compared to HCl HBr

heating alcohol with these acid result in loss of water and formation of alkene

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