testy

No

Problem

The

answer

1

The shorter C-C bond exist in: a) benzene; b) methane; c) acetylene; d) ethyiene

2

The hydrogen bonds are not existing between molecules of: a) acetic acid; b) imidazole; c) chloroform; d) ethanol

3

In cyclohexane the angle between neighbouring axial and equatorial hydrogen atoms is: a)0°; b) 120°, c)180°; d) 60°

4

The geometrie isomers exist in molecule of: a) 1-butene; b) 2-butene; c) 2,3-dimethylbutene; d) 2-methyl-1 -butene

5

ln D-glucopyranose the number of chiral eentre is: a) 3; b) 4; c) 6; d) 5

6

One from the following compounds is not aromatic: antracene; b) uracil; c) pyridine; d) imidazole.

7

The carbenium ions are formed in reactions of: a) alkanes with superacids; b) alkanes with bromine; c) arenes with superacids; d) alkenes with superacids

8

Nitration of alkanes proceeds according to mechanism of: a) Sr; b) Sn2; c) SnI; d) Sni

9

The allene formally belongs to: a) 1,3-diene; b) 1,2-diene; c) alkanes; d) aromatic compounds.

10

Cyclohexanone in reaction with morpholine gives: a) imine; b) enamine; c) aminoalcohol; d) reaction does not occur

11

Cyclopentanone poses an unsaturation factor: a) 2; b) 3; c) 4; d) 0

12

Carbenes are useful intermediates in synthesis of: a) alkenes; b) cyclopropanes; c) dienes; d) imines

12

The ON bond is not present in: a) oximes; b) hydrazones; c) enamines; d) imines

13

Amino acids are insoluble in: a) water, b) 5% hydrochloric acid, c) anhydróus ethyl ether; d) 5% sodium hydroxide

14

In reaction of ethyl benzoate with an excess of phenyl magnesium bromide is obtained: a) primary alcohol; b) secondary alcohol; c) tertiary alcohol; d) reaction does not occur

15

Acetals are products of carbonyl compounds with: a) one molecule of alcohol; b) one molecule of aminę; c) two molecules of alcohol; d) two molecules of aminę