Chemistry mistake questions

Which reagent can be used to distinguish phenol from benzyl alcohol?

FeCl3

Salicylic acid is stronger than benzoic acid because:

an intramolecular hydrogen bond is formed between the two functional groups

Phenols are more acidic than alcohols because:

the phenoxide ion is stabilised by resonance

The strongest acid among the following aromatic compounds is:

ortho-nitrophenol

What is the common name for CH2=CHCH2Cl:

allyl chloride

Which reagent cannot be used for preparing alkyl chlorides from alcohols?

NaCl

The reactivity of alkyl halides decreases in the following order:

RI>RBr>RCl>RF

Which compound is a homologue of ethanal?

methanal

Which compound contains an asymmetric (chiral) carbon atom

2-bromobutane

The hydrolysis of 4-chlorobenzyl chloride with a concentrated solution of sodium hydroxide results in:

p-hydroxybenzyl alcohol

The polyvalent alcohols are identified with:

freshly precipitated copper (II) hydroxide

The reactions by which m-nitrophenol can be produced from benzene are:

sulfonation, nitration, reaction with sodium hydroxide, alkali melting

The mild oxidation of which alcohol does not give a carbonyl compound?

2,3-dimethyl-3-pentanol

Which pair are metamers?

CH3OCH2CH2CH3 and CH3CH2OCH2CH3

How a solution containing benzene, naphthalene, phenol and aniline can be separated:

the phenol is extracted after treatment with sodium hydroxide, the aniline is extracted after treatment with hydrochloric acid, and benzene and naphthalene are extracted through distillation

Which halogen notably does not react with methane by the chain-linking mechanism?

iodine

Hexane may be obtained in highest yield by Wurtz method from:

1-chloropropane

The amino acids do not interact with

salts

Which of the following compounds is a product of the interaction between glucose and Fehling’s reagent:

CH2OH(CHOH)4COOH

Which of the following compounds contains an aldehyde group:

all listed compounds

How many carbon atoms in the molecule of acrylonitrile are in the sp-hybrid state

one

The maltose is:

a dissacharide consisting of glucose residues, an intermediate in the hydrolysis of starch

Which of the listed compounds interacts with bromine water?

ethyn

Characteristic reactions for alkenes are:

addition

As a result in the reaction of polycondensation is formed:

phenol formaldehyde resin

Upon interaction of phenol with bromine is formed a mixture of:

2- and 4- bromophenols

By the help of which reagent may 1-propanol and 1,2,3-propantriol be distinguished?

copper (II) hydroxide

Which of the following amino acids is achiral?

glycine

By which of the presented processes and interactions can formic acid be distinguished from ethanoic acid?

cuprum dihydroxide

With which of the compounds: ethanol, sodium hydroxide and acetic anhydride, interacts with salicylic acid?

sodium hydroxide, ethanol and acetic anhydride

Which of the folllowing will give 1-butene as the only alkene by heating with concentrated sulfuric acid?

1-butanol

Glucose and fructose may be distinguished by interaction with:

bromine water

Which is not a physical property of alcohols or phenols?

the hydroxyl group of an alcohol is nonpolar

The benzene ring of benzaldehyde substitutes at m-position to the aldehyde group, because it has:

-M and -I effect

Carbonyl derivatives do not add one of the following substances:

bromine

The molecular formula of glycerol is:

C3H5(OH)3

The interaction between which substances is an addition reaction?

ethanal and hydrogen

The colourless crystalline substance A is slightly soluble in water, it sublimes when heated, and 2 mol of NaOH are needed for the neutralisation of 1 mol of A

Substance A is:

salicylic acid

Which of the reagents can be used to identify glycerol

with an aqueous solution of FeCl3 - violet colouring

Sucrose is a carbohydrate. The molecular formula of the compound is:

C12H22O11

The use of fats with alkaline base in an aqueous medium during heating is used in the production of:

soaps

Oxidation of butanone produces:

acetic and propionic acids, CO2 and H2O

In which order are carboxylic acids arranged by increasing their acidic properties?

propionic, acetic, benzoic, formic

The vigorous oxidation of which isomer of hexene does not result in a mixture of acids?

3-hexene

In which order are the compounds arranged in order of increasing reactivity?

CH3COC2H5, CH3COCH3, CH3CHO, HCHO

Under what conditions can hydrogen atoms in the side chain of toluene be replaced by atoms of halogen elements?

under illumination at high temperature

A natural polymer is:

the rubber

Hydrogen bonds can not form between molecules of:

CH3CHO and CH3COCH3

Oxidation of ethylene (CH2=CH2) produces:

1,2-ethanediol

A phenolic hydroxyl group can be identified with a dilute aqueous solution of:

FeCl3

The equation: C2H5OH + HCOOH →←HCOOC2H5 + H2O expresses the process:

esterification

In the molecules of alpha-amino acids the groups -NH2 and -COOH are connected to:

the first carbon atom

Which of the following compounds does not react with an ammonia solution of Ag2O?

3-hexanone

The two functional groups in alpha-amino acids interact with each other and form intramolecular salts. It is due to…

the high solubility in water, the high melting point and the low solubility in organic solvents

In which hydrocarbon conversion process do the final products contain a greater number of carbon atoms than the starting substances?

Wurtz synthesis

Polymethyl methacrylate is obtained by polymerisation of:

CH2=C(CH3)COOCH3

Benzaldehyde is involved in substitution reactions affecting the aromatic nucleus. In which place are the substitutes oriented:

m-position

Which of the following acids has optical isomers?

lactic acid

Positional isomerism is possible with:

amino acids, ketones, alkynes

Which of the following substances does not react with freshly precipitated copper dihydroxide?

propanone

Which chain of chemical reactions is not possible?

C2H5OH → C2H5CHO → C2H5COOH

Optical isomerism is not characteristic of:

2-amino-2-methylpropanoic acid

The molecular formula C6H12O6 corresponds to the compounds:

glucose and fructose

Cellulose dissolves in:

Schweitzer’s reagent

From which compound is hexan-3-one obtained as the only organic product under the conditions of the Kucherov reaction?

CH3CH2C=-CCH2CH3

Reagent for qualitative identification of ethylene glycol is:

freshly precipitated Cu(OH)2

The chain-radical halogenation of alkanes occurs under the action of:

diffuse sunlight

The compounds (E)-3-methylhex-3-ene and (Z)-hept-2-ene are:

constitutional (structural) isomers

Ethanol has a lower boiling point than water because…

the attraction between the molecules is weaker

Give the IUPAC name of this compound: CH3OCH2CH3

methoxyethane

The segment -CH2CH2CH2CH2CH2CH2- represents the polymer named:

polyethylene

Which of the following reacts with [Ag(NH3)2] giving a white precipitate:

CH3CH2C=-CH

Which of the following is a correct name for (CH3)2CHCOCH3?

4-methyl-3-penten-2-one

As a result of the interaction of acetylene with water in the presence of salts of divalent mercury ions, the following is formed:

CH3CHO

Linolenic acid as opposed to stearic acid:

decolourised bromine water