Question

the answers i circled are incorrect except for number 10. i know number 8 is d. for those two can you explain why the answer is that? can you give me the correct answers and explain why?

ren with Down Syndrome waren with local deve we described as generat ) lam towan l and e ch rochemical court of Th correct configuration? is RS). Which offi ces corresponds OH OM HOCH,HOH I WHER TNH, CH, HO CH, w AT 111 D) IV the which of the following us 7) In the first propagation step of the free radical chlorination of A) CI2 dissociates B) A chlorine radical abstracts a hydrogen C) A carbon radical reacts with CI D) A carbon radical reacts with a chlorine radical E) Two chlorine radicals combine. 8) In the reaction of Cl2 with ethane and UV light, which of the following reactions would event(s)? -D) CI+ CH3-CH3 - CH3-CH2-CI+H SIT) CH. + CH3-CH3 CH3-HOC + HCI III) CI + CH3-H2CHCH3-CH2-C1 IV)CH2 + CH3-H2C-CH3-CH2-CI+CI- V) C12 + UV light+C++CI: V and A) reactions and V- B) reactions II, III and IV C) reactions I and IV D) reactions II and IV reactions I, II and IV 9) Which of the following reactive intermediates can best be described as both nucleophilic and strongly A) carbanions B) carbocations C) carbenes D) free radicals E) alkanes 10) The major monobrominated product which results when ethylcyclohexane is subjected to free radical bromination is A) a primary bromide B) a secondary bromide Cha tertiary bromide D) a quaternary bromide E) bromomethane

Answer 1

Ans 6 0 GH D -Threonine ㅜ냉 converting the : structure to Fischer Projection GOOH Step 1 - Numbering of a stereo centu! D 40 2. h Coon where RE CHCOUCH в реktrоeлo But His pointing forward we must reverse sto R S. i. S. step 2 - Numbering of ₂ sterocentur. where Ri = CH (NM) Cook clock neure H is R. 7. Hence 25, BR. Free Reclical mechanism meth ane - of chlorination of Step 1 homolysis of chlonne chlonne atome in the © Initiation - molecull to 0

pecesence of light are ce + ce Stepa Propagation - hydrogen atom is pulled off o fiom methane by Chlorine rolicals 4-e-H & ce - he & Ha 4. race ecete step3 Bopageeton Termination ce'tce - Ch he + ci ye-ce he + 4 he-CH3. Hence in the first propagation step chlorine ruelical v abstracts hydrogen fecom methane. or correct option is B 2 3

8 — + & ch , чи light 2 CH-CH-ce & CH-CH nA Initiation cere u ce + ce ligul Propagation est-c-n & co - Hem & Hee 3 Herco & ce-ce CH 5 Hence in the propagation step reaction 11 and reaction in welll eccen. o option is correct. Cabanions are best described as Nucleophilic as well as Basle because Nucleophiles. are the species which an electron mich de they have a tendency to share on clonate then elections. Allicleopheles can be choveged as well as neutral such as ho neutral wehree as ce charged Hence we can say canbanion is a nucliophill call in basie also as it has a strong tendency to donate in euction paus. I comect option is A.

B7 Br & Br Initiation & Bro - Propagation they hbr. 11,2 att duggen & stufe 42 Bro product 12 hydedde shift takes place bicause of the formation of moue stable 30 readical. O o corect option is c.