Exam practice

Question 1

Which has atom with unfilled valence shell of e-

A H2
B HO
C BF3
D H3O+

Answer 1

C

Question 2

Which not constitutional isomer of others (see 1b exam1)

Answer 2

A

Question 3

Which not true about res?
A each atom much have full valence shell e-
B diff energy
C res struct must same arrangement of atoms
D same # e-
E valid Lewis structure

Answer 3

A bc charges

Question 4

Which most important res? (Exam 1 1d)

Answer 4

B

Question 5

Smallest dipole moment?
A C-N
B C-O
C C-F
D O-H

Answer 5

A

Question 6

IHD of lidocaine (exam 1 1f)

Answer 6

C

Question 7

Which tetrahedral
1methane CH4
2methyl carbocation CH3+
3methyl carbanion CH3-
4borane BH3

Answer 7

1/3

Question 8

Which not true
A

Question 9

Bond angle c-o-c

Question 10

How many e- in valence shell of C in methyl

Answer 10

D 8 bc octet

Question 11

What is angle between two bromo groups in highest energy chair trans 1,2 dibromocyclohexane?
180
90
60
0

Answer 11

180

Question 12

Enantiomers are
Mirror image

At least one stereo center

Non superposable

Non super. Constitution. Isomer

Non super. Mirror

Answer 12

Non super mirror

Question 13

Strongest base
Ho-, RC 3bond C-, Ch3Ch2-, Nh2-, ch2=ch-

Answer 13

HO-

Question 14

Most ring strain

Answer 14

Cyclopropane 3

Question 15

Struct relation 3R,3R,4S and 2S,3S,4R

Answer 15

Enantiomers

Question 16

Which not true
All BL acid have H
All Lewis base also BL base
All Lew acid have H
All Lew acid e- deficient
BL says water both a/b

Answer 16

All Lewis has H

Question 17

Which not true meso compound?
One or more planes symmetry
Identical to mirror
More than one
stereocenter
R/S same on center

Answer 17

R/s same

Question 18

What reactive intermed formed with Allene with Br2 and H2O to give 1,2 broom alcohol

Answer 18

Carbanion

Question 19

When cyclohexene with OsO4 makes
Ea
Aa
Ee
Coplanar

Answer 19

Ea

Question 20

Which has highest HOMO
Methanol
Acetic acid
Sodium ethoxide
Water

Answer 20

C most nuc