Chem1611 Sample Quiz 3 PDF

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Chem1611

Sample Quiz 3 (i)

Last update: 12/5/20

1. Which one of the following reagents would best effect the conversion shown? a) H2 / Pd catalyst b) c) d) e)

NaBH4 followed by H+/H2O Cr2O72–/H+ hot conc. H2SO4 hot dilute OH–

CHO

CH2OH

2. Which one of the following reagents would best effect the conversion shown? a) conc. HCl b) excess NH3 c) SOCl2

O

O

O

d) H+/H2O/heat

O

O

e) OH–/H2O/heat

3. What are the major products from the hydrolysis of CH3CH2COOCH3 with hot 6 M HCl? a) P and R b) P and S c) Q and R d) Q and S e) none of the above

CH3OH

CH3O

P

Q

CH3CH2COOH

CH3CH2CO2

R

S

4. Which definition best describes the following pair of compounds? a) Enantiomers b) Diastereomers c) Constitutional isomers d) Conformers

CH3

Cl

H

H

Br

Cl

CH3 Br

e) Same compound

5. What is the order of priority (1st = highest) and the absolute configuration of the following compound? 1st a) Br b) Br

2nd CH3 COOH

3rd COOH CH3

4th H H

Abs. Config. (S) (R)

c) COOH d) Br

Br COOH

CH3 CH3

H H

(R) (S)

e) COOH

Br

CH3

H

(S)

COOH H 3C Br

H

6. Which of the following terms best describes the product from the following reaction? a) (R)-enantiomer b) (S)-enantiomer

H

CH3 OH

c) racemic mixture d) achiral compound

Cr2O72 / H

(R)-enantiomer

e) meso-compound

7. The reagents and reaction conditions to carry out the transformations below are:

(i) a) b) c) d)

OCH 2CH3

O

OH

OCH2CH3

(iii)

(ii)

(i) hot dilute H2SO4 (ii) Cr2O72–/H+ (iii) excess ethanol/H+ (i) hot dilute OH–/H2O (ii) Cr2O72–/H+ (iii) NaOCH2CH3 in ethanol (i) hot dilute H2SO4 (ii) OH–/H2O (iii) excess ethanol (i) hot conc. H2SO4 (ii) LiAlH4 followed by dilute acid (iii) NaOCH2CH3 in ethanol

e) (i) hot dilute OH–/H2O (ii) Cr2O72–/H+ (iii) excess ethanol/H+ Q 8-10 refer to the following four molecules.

OH NH2

N

CH3

OCH3

HO CHO tyramine

tropidene

vanillin

O N H morpholine

8. Which of the compounds will undergo an acid-base reaction with dilute HCl? a) tyramine and tropidene only c) tyramine only

b) tyramine, tropidene and morpholine only d) tropidene only e) all of them

9. Which of the compounds will undergo an acid-base reaction with dilute NaOH? a) tyramine and vanillin only c) tyramine only

b) tyramine, vanillin and morpholine only d) vanillin only e) none of them

10. Which of the compounds will react (effervesce or bubble) when treated with dilute NaHCO 3 solution? a) morpholine only c) tropidene only

Correct answers:

b) tyramine and vanillin only d) all of them e) none of them

1B, 2E, 3A, 4C, 5D, 6D, 7A, 8B, 9A, 10E

Chem1611

Sample Quiz 3 (ii)

Last update: 12/5/20

1. Which one of the following reagents would best effect the conversion shown? a) H2 / Pd catalyst b) c) d) e)

NaBH4 followed by H+/H2O Cr2O72–/H+ hot conc. H2SO4 hot dilute OH–

2. Which one of the following reagents would best effect the conversion shown? a) HCl(g) b) excess NH3 c) SOCl2 d) H+/H2O/heat e) OH–/H2O/heat

3. What are the major products from the hydrolysis of CH3CH2COOCH3 with hot 4 M NaOH? a) P and R b) P and S c) Q and R d) Q and S e) none of the above

CH3OH

CH3O

P

Q

CH3CH2COOH R

CH3CH2CO2 S

4. Which definition best describes the following pair of compounds? a) Enantiomers b) Diastereomers c) Constitutional isomers d) Conformers e) Same compound

5. What is the order of priority (1st = highest) and the absolute configuration of the following compound? 1st a) Cl

2nd CH3

3rd COOH

4th F

b) Cl c) COOH

F Cl

COOH F

CH3 CH3

(R) (R)

d) Cl e) COOH

F Cl

COOH CH3

CH3 F

(S) (S)

Abs. Config. (S)

6. Which of the following terms best describes the product from the following reaction? a) (R)-enantiomer b) (S)-enantiomer c) racemic mixture d) achiral compound e) meso-compound 7. The reagents and reaction conditions to carry out the transformations below are:

a) (i) dilute H2SO4 (ii) Cr2O72–/H+ (iii) conc. KOH in ethanol b) (i) dilute OH–/H2O (ii) LiAlH4 followed by dilute acid (iii) hot conc. H2SO4 c) (i) dilute H2SO4 (ii) LiAlH4 followed by dilute acid (iii) conc. KOH in ethanol d) (i) dilute H2SO4 (ii) LiAlH4 followed by dilute acid (iii) hot conc. H2SO4 e) (i) dilute OH–/H2O (ii) Cr2O72–/H+ (iii) conc. KOH in ethanol Q 8-10 refer to the following four molecules.

8. Which of the compounds will undergo an acid-base reaction with dilute HCl? a) proline and benzamide only c) proline and hygrine only

b) proline, hygrine and benzamide only d) hygrine only e) all of them

9. Which of the compounds will undergo an acid-base reaction with dilute NaOH? a) proline and benzamide only c) phenol and proline only

b) phenol, proline and benzamide only d) phenol only e) all of them

10. Which of the compounds will react (effervesce or bubble) when treated with dilute NaHCO 3 solution? a) proline and benzamide only c) phenol only

Correct answers:

b) phenol, proline and benzamide only d) proline only e) none of them

1C, 2D, 3B, 4E, 5B, 6A, 7D, 8C, 9C, 10D...