Hydroxy Compounds and Ethers Book Back Practice Test

12th Standard Chemistry — Hydroxy Compounds and Ethers: Book Back 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.

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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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