12th Chemistry Sura Guide for Students 2025

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12th Chemistry Sura Guide. We covered all the 12th Chemistry Sura Guide MCQs in this post for free so that you can practice well for the exam.

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12th Chemistry Sura Guide Objective for Students

Quick Quiz

Sodium phenate reacts with acetyl chloride to form:

(A) Methyl benzoate

(B) Acetyl phenol

(D) Chlorobenzene

Option c – Phenylacetate

Which of the following is not a phenolic compound ( 12th Chemistry Sura Guide MCQ )

(A) Salol

(B) o-Cresol

(D) Quinol

Option c – Anisole

An unacceptable name for a compound containing one -OH group attached to the benzene nucleus would be:

(A) Carbolic acid

(B) Hydroxybenzene

(D) Phenol

Option c – Catechol

Isopropyl alcohol on oxidation gives ( 12th Chemistry Sura Guide MCQ )

(A) Acetone

(B) Acetaldehyde

(D) Ethylene

Option a – Acetone

The highest boiling point is of:

(A) Ethanol

(B) Ether

(D) Aldehyde

Option a – Ethanol

In the reaction of glucose → ethyl alcohol, the enzyme involved is ( 12th Chemistry Sura Guide MCQ )

(A) Zymase

(B) Invertase

(D) Diastase

Option a – Zymase

Which compound has the highest boiling point?

(A) Acetone

(B) Diethyl ether

(D) Ethanol

Option d – Ethanol

Reimer-Tiemann reaction involves ( 12th Chemistry Sura Guide MCQ )

(A) Carbanion intermediate

(B) A carbene intermediate

(D) Free radical intermediate

Option b – A carbene intermediate

Phenol with Hinsberg’s reagent gives:

(A) Sulphone

(B) Sulphanilic acid

(D) Sulphonal

Option c – Sulphonic ester

Electrophilic substitution reactions in phenol take place at ( 12th Chemistry Sura Guide MCQ )

(A) p-position

(B) m-position

(D) o- and p-positions

Option d – o- and p-positions

Condensation of phenol and phthalic anhydride gives:

(A) Methyl orange

(B) Phenol red

(D) Phenolphthalein

Option d – Phenolphthalein

The major product obtained from the interaction of phenol with sodium hydroxide and carbon dioxide is ( 12th Chemistry Sura Guide MCQ )

(A) Salicylaldehyde

(B) Salicylic acid

(D) Benzoic acid

Option b – Salicylic acid

Phenyl magnesium bromide on reacting with ethanol forms:

(A) Phenol

(B) Benzene

(D) Isopropyl phenyl ether

Option b – Benzene

In Williamson’s synthesis, ethoxyethane is prepared by ( 12th Chemistry Sura Guide MCQ )

(A) Passing ethanol over heated alumina

(B) Sodium ethoxide with ethyl bromide

(D) Ethyl iodide and dry silver oxide

Option b – Sodium ethoxide with ethyl bromide

Ethyl chloride is converted into diethyl ether by:

(A) Wurtz synthesis

(B) Grignard reaction

(D) Williamson’s synthesis

Option d – Williamson’s synthesis

In Williamson’s synthesis for diethyl ether, which species works as a nucleophile ( 12th Chemistry Sura Guide MCQ )

(A) Halide ion

(B) Ethoxide ion

(D) Hydride ion

Option b – Ethoxide ion

The preparation of ethers from alcohols by using sulfuric acid is called:

(A) Williamson’s ether synthesis

(B) Williamson’s continuous etherification process

(D) Zerewitinoff method

Option b – Williamson’s continuous etherification process

The reaction of ethyl iodide with sodium ethoxide is ( 12th Chemistry Sura Guide MCQ )

(A) An electrophilic substitution reaction

(B) A nucleophilic addition reaction

(D) A free radical substitution reaction

Option c – A nucleophilic substitution reaction

The first member of the ether series on reaction with sodium and liquified ammonia gives:

(A) Methanol + methane

(B) Ethane + methanol

(D) Ethane

Option a – Methanol + methane

Mark the correct statement ( 12th Chemistry Sura Guide MCQ )

(A) Ethers behave as Lewis base

(B) Ethers form coordination complexes with Lewis acids

(D) All are correct

Option d – All are correct

Ether on carbonylation gives:

(A) Alkanoic acid

(B) Alkanone

(D) Alkanal

Option c – Alkyl alkanoate

Diethyl ether absorbs oxygen to form ( 12th Chemistry Sura Guide MCQ )

(A) Red-colored sweet-smelling compound

(B) Acetic acid

(D) Ether peroxide

Option d – Ether peroxide

Diethyl ether and air give ether-hydroperoxide. The mechanism of the reaction is:

(A) Nucleophilic substitution

(B) Free radical addition

(D) None of the above

Option b – Free radical addition

The order of reactivity of halogen acids with ether is ( 12th Chemistry Sura Guide MCQ )

(A) HCl > HBr > HI

(B) HI > HBr > HCl

(D) HI > HCl > HBr

Option b – HI > HBr > HCl

Isopropyl n-propyl ether is obtained by reacting 1-bromopropane with:

(A) Sodium ‘n-propoxide

(B) Sodium ethoxide

(D) Sodium bromide

Option c – Sodium isopropoxide

Ethyl acetate is prepared from ( 12th Chemistry Sura Guide MCQ )

(A) Silver methanoate and methyl alcohol

(B) Silver ethanoate and ethyl alcohol

(D) Silver ethanoate and ethyl bromide

Option d – Silver ethanoate and ethyl bromide

During the dehydrohalogenation of haloalkanes, the formation of the major product is decided on the basis of:

(A) Popff’s rule

(B) Saytzeff’s rule

(D) Markonikoff’s rule

Option b – Saytzeff’s rule

Elimination of HI from 2-iodo-2-methylbutane forms ( 12th Chemistry Sura Guide MCQ )

(A) 2-Methylbut-2-ene

(B) 2-Methylbut-1-ene

(D) Isopentyl alcohol

Option a – 2-Methylbut-2-ene

Organometallic compounds must have:

(A) Carbon-Oxygen bond

(B) Carbon-Metal bond

(D) Non-Metal atom

Option b – Carbon-Metal bond

Isopropyl iodide, on heating with excess alcoholic ammonia, produces:

(A) Trimethylamine

(B) Diethylamine

(D) Propan-2-amine

Option d – Propan-2-amine

1-Bromopropane, on boiling with alcoholic potassium nitrite, gives:

(A) 1-Nitropropane

(B) 2-Nitropropanate

(D) Sec-propyl nitrite

Option c – n-Propyl nitrite

During the alkaline hydrolysis of d-3-chloro-3-methylhexane, the product formed is:

(A) Levo rotatory

(B) Dextro rotatory

(D) Optically inactive

Option d – Optically inactive

Benzene, on reacting with bromine in the presence of Fe, produces:

(A) Benzyl bromide

(B) Bromobenzene

(D) m-Bromobenzene

Option b – Bromobenzene

When chlorobenzene reacts with acetyl chloride, it gives:

(A) p-Chloroacetophenone

(B) Chloroacetobenzene

(D) Methyl aceto chlorobenzene

Option a – p-Chloroacetophenone

The transition state is defined as the state of a reaction, which contains:

(A) Potential energy

(B) Maximum energy

(D) Minimum energy

Option b – Maximum energy

The oxidation product of trichloromethane is:

(A) Phosgene

(B) Sulphonyl chloride

(D) Dichloromethane

Option a – Phosgene

Which of the following can damage the cornea on direct contact?

(A) Trichloromethane

(B) Dichloromethane

(D) Dichlorodifluoromethane

Option b – Dichloromethane

The reaction between haloalkane and haloarenes to give alkylbenzene in the presence of sodium metal is:

(A) Groove’s reaction

(B) Wurtz reaction

(D) Wurtz-Fittig reaction

Option d – Wurtz-Fittig reaction

The temperature required to convert 1-chloro-4-nitrobenzene into 4-nitrophenol is:

(A) 433K

(B) 623K

(D) 523K

Option a – 433K

Which of the following groups increases the rate of alkaline hydrolysis of haloarenes?

(A) Nitro group

(B) Alkyl radical

(D) Electron-repelling

Option a – Nitro group

Electrophilic substitution in phenyl chloride is possible due to:

(A) Positive inductive effect of the halogen atom

(B) Negative inductive effect of the halogen atom

(D) Negative resonance effect of the halogen atom

Option c – Positive resonance effect of the halogen atom

Major chlorination product of chlorobenzene is:

(A) 1,2-dichlorobenzene

(B) p-dichlorobenzene

(D) o-dichlorobenzene

Option b – p-dichlorobenzene

Conversion of benzene into phenyl bromide is:

(A) Electrophilic addition reaction

(B) Electrophilic substitution reaction

(D) Nucleophilic substitution reaction

Option b – Electrophilic substitution reaction

Phenyl amine reacts with sodium nitrite and dil. hydrochloric acid produces:

(A) Chlorobenzene

(B) Benzene diazonium chloride

(D) Benzyl chloride

Option b – Benzene diazonium chloride

Geminal and vicinal dihalides are:

(A) Chain isomerism

(B) Position isomerism

(D) Nucleophilic addition

Option b – Position isomerism

For the preparation of propane nitrile from bromoethane, the other reactant is:

(A) HCN

(B) HNC

(D) AgCN

Option c – KCN

Chlorination of methane is:

(A) Electrophilic substitution

(B) Nucleophilic substitution

(D) Nucleophilic addition

Option c – Free radical substitution

Major acylation product of chlorobenzene is:

(A) 4-Chloro acetophenone

(B) 3-Chloro acetophenone

(D) m-Chloro acetophenone

Option a – 4-Chloro acetophenone

Reaction of n-butyl bromide with sodium methoxide produces mainly:

(A) Isobutane

(B) Isobutylene

(D) n-Butyl methyl ether

Option d – n-Butyl methyl ether

Polysubstitution is a major drawback in:

(A) Reimer Tiemann reaction

(B) Acetylation of aniline

(D) Friedel Craft’s alkylation

Option d – Friedel Craft’s alkylation

Polyhalogen derivative used as antiseptic is:

(A) Dichloromethane

(B) Trichloromethane

(D) Tetrachloromethane

Option c – Tri-iodomethane

Which of the following alkanes cannot be made in good yield by the Wurtz reaction?

(A) n-Butane

(B) n-Hexane

(D) n-Heptane

Option d – n-Heptane

Major product formed on the reaction of 2-bromobutane with KOH (alc.) is:

(A) But-1-ene

(B) But-2-ene

(D) Butan-1-ol

Option b – But-2-ene

The optically inactive compound from the following is:

(A) 2-Chloropentane

(B) 2-Chloropropanal

(D) 2-Chlorobutane

Option c – 2-Chloro-2-methylbutane

IUPAC name of westron is:

(A) 1,1,2,2-tetrachloroethene

(B) 1,1,2,2-tetrachloroethane

(D) 1,3,3,3-tetrachloroprop-1-yne

Option b – 1,1,2,2-tetrachloroethane

The synthesis of alkyl fluorides is best accomplished by:

(A) Free radical fluorination

(B) Sandmeyer’s reaction

(D) Swarts reaction

Option d – Swarts reaction

In alkaline hydrolysis of t-butyl bromide, the order of reaction with respect to nucleophile is:

(A) zero

(B) first

(D) second

Option b – first

A solution of (-)-1-chloro-1-phenylethane in toluene racemizes slowly in the presence of a small amount of SbCl3 due to the formation of:

(A) Carbanion

(B) Carbene

(D) Free radical

Option c – Carbocation

Iodoform can be prepared from all except:

(A) Isobutyl alcohol

(B) Ethyl methyl ketone

(D) 3-Methyl-2-butanone

Option a – Isobutyl alcohol

Which of the following on hydrolysis forms a racemate?

(A) Chloromethane

(B) 2-Iodobutane

(D) 1-Bromo-1-phenylethane

Option b – 2-Iodobutane

Which of the following compounds leads to the formation of a racemate on alkaline hydrolysis?

(A) 1-Bromo-1-phenyl ethane

(B) 1-Chloro-3-methyl butane

(D) 1-Chloro propane

Option a – 1-Bromo-1-phenyl ethane

Both geometrical and optical isomerism are exhibited by:

(A) Dichloro(ethylenediamine)cobalt(III) ion

(B) Pentaaminechlorocobalt(III)

(D) Trioxalatochromate(III) ion

Option a – Dichloro(ethylenediamine)cobalt(III) ion

The effective atomic number of cobalt in the complex is:

(A) 36

(B) 33

(D) 30

Option a – 36

The EAN of iron in potassium ferricyanide is:

(A) 18

(B) 35

(D) 23

Option b – 35

An example of a sigma-bonded organometallic compound is:

(A) Grignard’s reagent

(B) Ferrocene

(D) Ruthenocene

Option a – Grignard’s reagent

Which of the following coordination compounds would exhibit optical isomerism?

(A) trans-dicyanobis(ethylenediamine)chromium(III) chloride

(B) Tris-(ethylenediamine)cobalt(III)bromide

(D) Diamminedichloroplatinum(II)

Option b – Tris-(ethylenediamine)cobalt(III)bromide

According to IUPAC nomenclature, sodium nitroprusside is named:

(A) Sodium pentacyanonitrosyl ferrate(III)

(B) Sodium nitroferricyamide

(D) Sodium pentacyanonitrosyl ferrate(II)

Option a – Sodium pentacyanonitrosyl ferrate(III)

Ligands used in the estimation of hardness of water are:

(A) EDTA

(B) DMG

(D) Bromo

Option a – EDTA

Cis-platin is used in the treatment of:

(A) Malaria

(B) Cancer

(D) Yellow fever

Option b – Cancer

Which of the following compounds reacts with Lucas reagent on heating to give turbidity and a color change?

(A) n-propyl alcohol

(B) isopropyl alcohol

(D) sec-butyl alcohol

Option a – n-propyl alcohol

Primary, secondary, and tertiary alcohols can be distinguished from each other in the laboratory using:

(A) Finkelstein reagent

(B) Darzens reagent

(D) Lucas reagent

Option d – Lucas reagent

Acetonitrile’s functional isomer is:

(A) methenamine

(B) Methyl isocyanide

(D) Methyl alcohol

Option b – Methyl isocyanide

Which of the following pairs is composed of optical isomers?

(A) n-butyl chloride and isobutyl chloride

(B) isobutyl chloride and sec-butyl chloride

(D) d-sec-butyl chloride and l-sec-butyl chloride

Option d – d-sec-butyl chloride and l-sec-butyl chloride

When propene is heated with Br2 at 400-600°C, it produces:

(A) 1,2-dibromopropane

(B) 2-bromopropane

(D) 1-bromopropane

Option c – allyl bromide

Allyl bromide is prepared by the action of N-bromo-succinimide and what?

(A) Propene

(B) Ethene

(D) But-2-ene

Option a – Propene

During the iodination of a hydrocarbon using mercuric oxide, it is reduced to:

(A) Alkane (hydrocarbon)

(B) Water

(D) Mercuric iodide

Option d – Mercuric iodide

The preparation of isopropyl bromide from propene is a:

(A) Free radical addition reaction

(B) Electrophilic addition reaction

(D) Nucleophilic addition reaction

Option b – Electrophilic addition reaction

The addition of HBr to α-butylene in the presence of benzoyl peroxide is a:

(A) Nucleophilic addition reaction

(B) Free radical substitution reaction

(D) Free radical addition reaction

Option d – Free radical addition reaction

Isobutyl alcohol is heated with Lucas reagent to form

(A) Isobutyl chloride

(B) sec.butyl chloride

(D) isopropyl chloride

Option c – tert.butyl chloride

Markonikov’s rule is followed by the addition of ……. an alkene under normal conditions.

(A) HCl

(B) HBr

(D) All of the above

Option d – All of the above

Mayo effect can be observed in which of the following reactions?

(A) Hydrogenation of alkene

(B) Halogenation of alkane

(D) Williamson synthesis

Option c – Hydrohalogenation of alkene

During the chlorination of methyl benzene, the major product obtained is

(A) p-Chloro toluene

(B) 2-chloro toluene

(D) o-chloro toluene

Option a – p-Chloro toluene

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