Hydroxy Compounds and Ethers Practice Test

12th Standard Chemistry — Hydroxy Compounds and Ethers: Online Practice Test

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An alcohol (x) gives blue colour in Victor Meyer’s test and 3.7g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

A.\(CH_3CH(OH)CH_2CH_3\) B.\(CH_3-CH(OH)-CH_3\) C.\(CH_3C(OH)(CH_3)_2\) D.\(CH_3-CH_2-CH(OH)-CH_2-CH_3\)

Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

A.benzaldehyde B.propanoic acid C.methyl propanoate D.acetaldehyde

In the reaction sequence, Ethene \(\xrightarrow{HOCl}\) A \(\xrightarrow{X}\) ethan -1, 2 - diol. A and X respectively are

A.Chloroethane and \(NaOH\) B.ethanol and \(H_2SO_4\) C.2-chloroethan-1-ol and \(NaHCO_3\) D.ethanol and \(2H_2O\)

Which one of the following is the strongest acid

A.2-nitrophenol B.4-chlorophenol C.4-nitrophenol D.3-nitrophenol

Carbolic acid is

A.Phenol B.Picric acid C.benzoic acid D.phenylacetic acid

Which one of the following will react with phenol to give salicyladehyde after hydrolysis.

A.Dichloro methane B.trichloroethane C.trichloro methane D.\(CO_2\)

\((CH_3)_3 - C - CH(OH) CH_3 \xrightarrow{Con H_2SO_4} X\) (major product)

A.\((CH_3)_3 CCH = CH_2\) B.\((CH_3)_2 C = C (CH_3)_2\) C.\(CH_2 = C(CH_3)CH_2 - CH_2 - CH_3\) D.\(CH_2 = C (CH_3) - CH_2 - CH_2 - CH_3\)

Assertion : Phenol is more acidic than ethanol Reason: Phenoxide ion is resonance stabilized

A.both assertion and reason are true and reason is the correct explanation of assertion. B.both assertion and reason are true but reason is not the correct explanation of assertion. C.assertion is true but reason is false D.both assertion and reason are false.

In the reaction Ethanol \(X \xrightarrow{PCl_5} Y \xrightarrow{alc.KOH} Z \xrightarrow{H_2SO_4/H_2O, 298K}\). The 'Z' is

A.ethane B.ethoxyethane C.ethylbisulphite D.ethanol

Q10

Isopropylbenzene on air oxidation in the presence of dilute acid gives

A.\(C_6H_5COOH\) B.\(C_6H_5COCH_3\) C.\(C_6H_5COC_6H_5\) D.\(C_6H_5-OH\)

Q11

Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction Reason : In the case of phenol, the intermediate arenium ion is more stabilized by resonance.

A.if both assertion and reason are true and reason is the correct explanation of assertion. B.if both assertion and reason are true but reason is not the correct explanation of assertion. C.assertion is true but reason is false D.both assertion and reason are false.

Q12

\(HO CH_2 CH_2 – OH\) on heating with periodic acid gives

A.methanoic acid B.Glyoxal C.methanal D.\(CO_2\)

Q13

Which of the following compound can be used as artifreeze in automobile radiators?

A.methanol B.ethanol C.Neopentyl alcohol D.ethan -1, 2-diol

Q14

One mole of an organic compound (A) with the formula \(C_3H_8O\) reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is

A.propan – 2-ol B.propan -1-ol C.ethoxy ethane D.methoxy ethane

Q15

Williamson synthesis of preparing dimethyl ether is a / an /

A.\(S_N1\) reactions B.\(S_N2\) reaction C.electrophilic addition D.electrophilic substitution

Q16

On reacting with neutral ferric chloride, phenol gives

A.red colour B.violet colour C.dark green colour D.no colouration.

Q17

Which of the following organic compounds is classified as a trihydric alcohol?

A.Ethane-1,2-diol B.Ethanol C.Propane-1,2,3-triol D.Hexan-1,2,3,4,5,6-hexol

Q18

What is the IUPAC name for neopentyl alcohol?

A.2,2-dimethylpropan-1-ol B.2-methylbutan-1-ol C.2,2-dimethylbutan-1-ol D.3,3-dimethylpropan-1-ol

Q19

Identify the major product formed when formaldehyde reacts with ethyl magnesium bromide followed by acid hydrolysis.

A.Ethanol B.Propan-1-ol C.Propan-2-ol D.Butan-1-ol

Q20

Which alcohol is obtained as the major product through the hydroboration-oxidation of propene?

A.Propan-2-ol B.Propan-1-ol C.Ethane-1,2-diol D.Isopropyl alcohol

Q21

In Victor Meyer's test, which of the following alcohols does not produce any coloration after treatment with KOH?

A.Ethanol B.Propan-2-ol C.2-methylpropan-2-ol D.Benzyl alcohol

Q22

Which alcohol reacts immediately with Lucas reagent to produce turbidity at room temperature?

A.Methanol B.Ethanol C.Propan-2-ol D.2-methylpropan-2-ol

Q23

According to Saytzeff's rule, the intramolecular dehydration of butan-2-ol using concentrated sulphuric acid at 443 K yields which major product?

A.But-1-ene B.But-2-ene C.Butane D.Cyclobutane

Q24

Alcohols generally have higher boiling points than corresponding alkanes or ethers of similar molecular mass due to:

A.Van der Waals forces B.Ionic bonding C.Intermolecular hydrogen bonding D.Coordinate covalent bonding

Q25

Which of the following compounds exhibits the greatest acidic strength?

A.Ethanol B.Phenol C.p-nitrophenol D.p-cresol

Q26

What product is formed when benzene diazonium chloride is heated with water?

A.Benzene B.Chlorobenzene C.Phenol D.Nitrobenzene

Q27

In Kolbe's reaction, phenol reacts with sodium hydroxide and carbon dioxide followed by acidification to produce:

A.Salicylaldehyde B.Salicylic acid C.Benzoic acid D.Phthalic acid

Q28

What is the IUPAC name for tertiary butyl methyl ether?

A.1-methoxy-2-methylpropane B.2-methoxy-2-methylpropane C.2-methoxybutane D.2-ethoxypropane

Q29

Williamson ether synthesis involves the reaction between an alkoxide ion and an alkyl halide. What is the mechanism of this reaction?

A.SN1 B.SN2 C.Electrophilic substitution D.Electrophilic addition

Q30

When methoxyethane is heated with one equivalent of HI, the products formed are:

A.Methanol and Ethyl iodide B.Iodomethane and Ethanol C.Iodomethane and Ethyl iodide D.Methanol and Ethanol

Q31

Which of the following ethers is commonly used as a general anesthetic agent in surgery?

A.Dimethyl ether B.Methoxybenzene C.Diethyl ether D.Diphenyl ether

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About this Hydroxy Compounds and Ethers test

This free online practice test covers Hydroxy Compounds and Ethers from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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