7. The major produco) in the following reaction is (are CH,CH CH OH OCH CH, CHCH

Question

7. The major produco) in the following reaction is (are CH,CH CH OH OCH CH, CHCH2 CH,CH IAJ Only (B) Only ICI A racemic misture o TUl andD ID) Nene of these S. Which of the following represents the onder of solv ents in increasing polarity from left to right A) methanol, acetone, ethyl acetate, hexanes B) hexanes, ethyl acesale, acctone, methanol C) acetone, hexates methanol, ethyl acetaie D) ethyl acetate, methanol, hexanes acetone 9. Is nn Laver Chromatograpiy(TLC) Re stands for A) Rate factor B) Refractive Index C) Retardation factor D) None of the above 1o. Which of the following statements is(are) true? A) If a polar compound moves too slowly in a nost-pola solvent, swiching to a more polar solvent will cause the compound to move faster B) If a non polse compound moves too fast on a TLC plate switching to a less polar solvent will cause the compound to move skower C) The D) All of the above polarity of a solvent system cam be varied by mixing two solvents together 11. An experiment resulled in the generaion of aperoximaely 30 mL of organic wasie, which s mesily chlorodorn CHC,. The correet method of disposal of this waste is to A) Carefully pourdown the sink and subsequently nist with cold winer B) Allow it to sit for a while in the fume hood for complete evapceation C) Pouring the material into a waste contaiser D) None of dhese designated for halogenated wastes

Explanation / Answer

Q8

methanol is the most polar, since it has CH3-OH raito is 1:1 almost

then comes acetone, since CH3-C=O-CH3, is present, this has 3 carbon to 1 oxygen

3rd is ethyl acetate, with 5 carbons and an ether + carbonyl groups which are not that polar, due to the ester formation

finally, hexane is the least polar, since it ocntains only carbon and hydrogens

then

hexane < ethyl acetate < acetone < methanol

Q9.

Rf stands for retention factor, thereofre, it is not present, choose D

Q10

only C i strue, since a and b are "reversed" if we add more nonpolar to the nonpolar and poalr to the polar samples, they will elute faster

Q11

30 mL of CH3Cl cant be discarded in the sink

we must pour this into a special halogeneated container, which is C

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