6) Which one has the weakest conjugate base? a) CH;CH;OH b) HCECH c) NH3 d) HCI e) H;0

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*Given the following information, answer the questions 6 and 7
Acid
NH3
HC=CH
pKa
Acid
pKa
CH;CH:OH
38
16.0
25
15.7
HCL
-7
6) Which one has the weakest conjugate base?
a) CH;CH2OH
b) HCECH
c) NH3
d) HCI
e) H20
7) Which of the following reactions takes place to a significant extent?
NH3 + HC=C
NH2 + HCECH
II
OH + CH;CH2OH-
H,0 +CH3CH20
OH + HC=CH
H2O + HCEC
III
Cr + H,0
HCI+ OH
IV
a) II and III
b) I only
c) IV only
d) I and IV e) III only
8) What is the correct Cahn-Ingold-Prelog rankings to the following sets of
substituents?
a) -CH(CH3)2>- C(CH3)3> - CH-CH2>- CH;CH3
b) -CH=CH2 > - CH(CH3)2 > - C(CH;)3 > - CH2CH3
c) -CH=CH2 > - CH(CH3)2 > - CH2CH3>- C(CH3)3
d) -C(CH3);> - CH(CH3)2>- CH=CH2 > - CH2CH3
e) -C(CH3);>- CH=CH2 > - CH(CH3)2 >, - CH2CH3
9) The correct statement about diastereomers is;
a) They are non-mirror image stereoisomers
b) They have identical physical properties
c) They have plane of symmetry
d) They are constitutional isomers.
e) They are interconvertable by rotation around sigma bond
10) The compound with R configuration is;
NH2
CH3
CI
CH2OH
H.
CHS
CH
CH2Br
HO
CH,
NH2
CO,H
Hln
Hl
CN
HO.
Br
HS
a
Transcribed Image Text:*Given the following information, answer the questions 6 and 7 Acid NH3 HC=CH pKa Acid pKa CH;CH:OH 38 16.0 25 15.7 HCL -7 6) Which one has the weakest conjugate base? a) CH;CH2OH b) HCECH c) NH3 d) HCI e) H20 7) Which of the following reactions takes place to a significant extent? NH3 + HC=C NH2 + HCECH II OH + CH;CH2OH- H,0 +CH3CH20 OH + HC=CH H2O + HCEC III Cr + H,0 HCI+ OH IV a) II and III b) I only c) IV only d) I and IV e) III only 8) What is the correct Cahn-Ingold-Prelog rankings to the following sets of substituents? a) -CH(CH3)2>- C(CH3)3> - CH-CH2>- CH;CH3 b) -CH=CH2 > - CH(CH3)2 > - C(CH;)3 > - CH2CH3 c) -CH=CH2 > - CH(CH3)2 > - CH2CH3>- C(CH3)3 d) -C(CH3);> - CH(CH3)2>- CH=CH2 > - CH2CH3 e) -C(CH3);>- CH=CH2 > - CH(CH3)2 >, - CH2CH3 9) The correct statement about diastereomers is; a) They are non-mirror image stereoisomers b) They have identical physical properties c) They have plane of symmetry d) They are constitutional isomers. e) They are interconvertable by rotation around sigma bond 10) The compound with R configuration is; NH2 CH3 CI CH2OH H. CHS CH CH2Br HO CH, NH2 CO,H Hln Hl CN HO. Br HS a
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