chem red questions

Question 1

Isomerism for the specified compounds CH 3 – CH 2 – CH 2 – CH 2 – OH and
CH 3 - CH( OH) – CH 2 – CH 3
refers :
functional group position isomerism
spatial isomerism
carbon chain isomerism
multiple bond position isomerism

Answer 1

functional group position isomerism

Question 2

Which two reagents can be used to determine the non-limiting hydrocarbon content?
bromine water
Potassium permanganate in a neutral medium
Phenols
Pyridine

Answer 2

bromine water
Potassium permanganate in a neutral

Question 3

Pyruvic acid is involved in carbohydrate metabolism and is part of the Krebs cycle.
Specify what class of compounds it belongs to?
oxo acids catecholamines amino acids oxy acids(hydroxy acids)

Answer 3

oxo acids

Question 4

Specify 2 six-membered heterocycle With two atoms nitrogen
pyrazine, pyrimidine pyridine, pyrimidine pyrrole, pyrimidine pyrimidine, furan

Answer 4

pyrazine, pyrimidine

Question 5

What is the role of barbituric acid derivatives in medicine?
are hypnotics
are tonics
have a vasodilatory effect
lower blood pressure

Answer 5

are hypnotics

Question 6

Specify the oxidation product of beta - methylpyridine
nicotinic acid pyridoxal n-methylpyridinium piperidine

Answer 6

nicotinic acid

Question 7

Give 2 characteristics of pyridine
aromatic heterocyclic compound
electron-deficient system
pi-redundant system
has acidic properties

Answer 7

aromatic heterocyclic compound
electron-deficient system

Question 8

What class of compounds do monosaccharides belong to?
Hetero-Polyfunctional compounds Polyfunctional compounds Aldehydes Alcohols

Answer 8

Hetero-Polyfunctional compounds

Question 9

What compound can be used to obtain ethyl alcohol?
Glucose
Benzol
Cumene(Kumol)
Phenol

Answer 9

Glucose

Question 10

Which monosaccharide belongs to ketohexoses?/What monosaccharide belongs to
ketohexoses?
Fructose
Mannose
Galactose
Glucose

Answer 10

Fructose

Question 11

Cyclic forms of monosaccharides by chemical nature
Polyacetalss
Chelates
Ethers
Esters

Answer 11

Polyacetalss

Question 12

What protein structure is characterized by globule formation?
Tertiary
Primary
Secondary
Quaternary

Answer 12

Tertiary

Question 13

Which two conformations are characteristic of cyclohexane?
1. Boat
2. Eclipsed
3. Staggered
4. Chair

Answer 13

1. Boat
2. Chair

Question 14

Specify 2 rules for determining whether stereoisomers belong to the D- or
L-series:
1. Determined by the configuration of the chiral center farthest from the carbonyl
group
2. Determined using the standard reference compound glyceraldehyde
3. Determined by the configuration of the carbonyl carbon atom
4. Determined using a polarograph

Answer 14

1. Determined by the configuration of the chiral center farthest from the carbonyl
   group
2. Determined using the standard reference compound glyceraldehyde

Question 15

Specify two correct answers explaining the essence of heterolytic bond
rupture:
1. Observed in radical processes
2. As a result of the rupture, free radicals are formed
3. Observed in addition and substitution reactions
4. As a result of the rupture, an electrophile and a nucleophile are formed

Answer 15

3. Observed in addition and substitution reactions
4. As a result of the rupture, an electrophile and a nucleophile are formed

Question 16

. Match the following particles with their properties:
1. Radical
2. Electrophile
3. Nucleophile
A. A particle that has a free orbital at the outer electron levelB. A particle containing
an unpaired electron in its outer electron shellC. A particle having a pair of electrons at
the outer electron level

Answer 16

Radical-b
3. Nucleophile-c
electrophile-a

Question 17

. Identify 3 compounds that are not heterocyclic:
1. Pyridine
2. Cumene
3. Nitrobenzene
4. Phenol

Answer 17

2. Cumene
3. Nitrobenzene
4. Phenol

Question 18

Specify 2 simple lipids:
1. 1-palmitoyl distearoylglycerin
2. Phospholipids
3. Sphingolipids
4. Tristearoylglycerin

Answer 18

1. 1-palmitoyl distearoylglycerin
2. Tristearoylglycerin

Question 19

Choose 3 saturated fatty acids:
1. Palmitic acid
2. Stearic acid
3. Linoleic acid
4. Lauric acid

Answer 19

1. Palmitic acid
2. Stearic acid
3. Lauric acid

Question 20

Specify a substance that is not related to carbonyl compounds
acetone
ethanol
ethanal
butanone

Answer 20

ethanol

Question 21

Which amino acid contains an imidazole ring?
histidine proline tryptophan arginine

Answer 21

histidine

Question 22

Which compound is homopolysaccharide ?
dextrin
hyaluronic acid
chondroitin sulfate
heparin

Answer 22

Dextrin

Question 23

What class of compounds do monosaccharides belong to?
Polyfunctional compounds
Hetero-Polyfunctional compounds Aldehydes Alcohols

Answer 23

Hetero-Polyfunctional compounds

Question 24

Specify connection that refers to To heteropolysaccharides
heparin glycogen dextrin starch

Answer 24

heparin

Question 25

When oxoacids are reduced,... are formed. Hydroxy acids Amino acids Amino alcohols Aldehydes

Answer 25

Hydroxy acids