CHEM 255, TEST IV, PAGE 10 C}, C CH, CH, CH CH) OH 34. Which agent(s s) can be u

Question

CHEM 255, TEST IV, PAGE 10 C}, C CH, CH, CH CH) OH 34. Which agent(s s) can be used in this oxidation? (A) NCrO, but not PCC (B) PCC but not HCrO, (C) both (D) ne 35 reacts faster with H than other halogens do because the step (s) of its nechanisn is (are) lower in activation energy. 35. (C)T2, initiation. (D) Propagation (A) F initiation.. (B) F F.,' initiation" (B) F2 , propagation 36. CH, CH2 CH CH CHCH3CHCH2CH2X IT Br2 gives more of product than ci2 because Br2 1sselectlve (A) I, more (B) I, less (C) II, more (D) II, less 7. Which would be produced fastest by cationic polymerization? (A) ...-CH2-CH2-CH2-CH,-... (B) ,. .-CH2 _ CHCI-CH2-CHCI-... (C) CH2 CHF- CH2- CHF- (D) CH2 CH(CHs)- CH2 CH(CH3)-

Explanation / Answer

34. For the given secondary alcohol to ketone conversion,

the oxidation reagent that can be used is,

(c) both

35. In the free radical substitution reaction of CH4 with halogen, the halogen that reacts fastest and is due to,

(A) Fe, initiation

36. For the given free radical reaction,

Br2 gives more of I than Cl2, because Bbromine is more selective

(A) I, more

37. The one that can be produced fastest by cationic polymerization is,

(D)

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