SSLC Chemistry Previous Year Question Paper 2025

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SSLC Chemistry Previous Year Question Paper for Students

Quick Quiz

Carboxyl carbon is less electrophilic than carbonyl carbon in alkanal and alkanones due to:

(A) Negative inductive effect of both oxygen atoms.

(B) Delocalization of lone pair of electrons on oxygen in -OH group.

(D) Electron-donating inductive effect of alkyl group.

Option b – Delocalization of lone pair of electrons on oxygen in -OH group

Toluene is treated with CO and HCl under high pressure in the presence of cuprous chloride to give ( SSLC Chemistry Previous Year Question )

(A) p-Chlorotoluene

(B) p-Methoxytoluene

(D) p-Nitro anisole

Option c – p-Methyl benzaldehyde

Dodecanal is the partial reduction product of:

(A) Ethyl decanoate

(B) Methyl dodecanoate

(D) Dodecanol

Option b – Methyl dodecanoate

During the preparation of butanone from alkane nitrile, which is not used? ( SSLC Chemistry Previous Year Question )

(A) Ethyl cyanide

(B) Methyl magnesium bromide

(D) n-Propyl magnesium bromide

Option d – n-Propyl magnesium bromide

By Rosenmund reduction, aldehydes are prepared from:

(A) Alcohols

(B) Carboxylic acids

(D) Alkyl cyanides

Option c – Acyl chlorides

In the preparation of alkanals and alkanones by oxidation of alkanol, the yield of alkanones is maximum as compared to alkanals because ( SSLC Chemistry Previous Year Question )

(A) Alkanals are oxidized into alkanoic acid, whereas alkanones cannot.

(B) Alkanones are less volatile.

(D) Alkanals are lost from the reaction mixture due to low boiling point.

Option a – Alkanals are oxidized into alkanoic acid, whereas alkanones cannot

Acyl chloride is reduced to the corresponding aldehyde by hydrogen using a palladium catalyst poisoned with barium sulfate. This reaction is known as:

(A) Bimolecular reduction

(B) Rosenmund reduction

(D) Clemmensen’s reduction

Option b – Rosenmund reduction

Carboxylation of alkyl magnesium halide is carried out by ( SSLC Chemistry Previous Year Question )

(A) Dry ice

(B) Dry ether

(D) Carbon monoxide

Option a – Dry ice

Benzoic acid is obtained by:

(A) Reduction of benzamide

(B) Oxidation of benzoyl chloride

(D) Carboxylation of Ph-Mg-Cl

Option d – Carboxylation of Ph-Mg-Cl

Isobutyric acid is the carbonation product of ( SSLC Chemistry Previous Year Question )

(A) Isopropyl magnesium iodide

(B) Isobutyl magnesium iodide

(D) n-Propyl magnesium iodide

Option a – Isopropyl magnesium iodide

Hexane-1,6-dioic acid is obtained by oxidation of:

(A) Hex-2-ene

(B) Cyclohexene

(D) 3-methyl cyclohex-1-ene

Option b – Cyclohexene

The boiling point of carboxylic acids is higher than alcohols due to ( SSLC Chemistry Previous Year Question )

(A) Their larger size

(B) Strong dipole-dipole interaction

(D) Formation of dimer through strong intermolecular H bonding.

Option d – Formation of dimer through strong intermolecular H bonding

Water is removed from ethanoic acid to get glacial acetic acid by:

(A) Distillation

(B) Heating

(D) Cooling at 289.5 K

Option d – Cooling at 289.5 K

Vinegar is ……….% aqueous solution of acetic acid ( SSLC Chemistry Previous Year Question )

(A) 30

(B) 12 to 22

(D) 6 to 8

Option d – 6 to 8

During the formation of hydrogen bonding in water and carboxylic acids, how many molecules of carboxylic acids are linked to a water molecule?

(A) Four

(B) Three

(D) One

Option b – Three

Alkanals and alkanones undergo reactions ( SSLC Chemistry Previous Year Question )

(A) Electrophilic substitution

(B) Electrophilic addition

(D) Nucleophilic substitution

Option c – Nucleophilic addition

The most reactive compound toward nucleophilic addition reaction is:

(A) Ethyl methyl ketone

(B) Dimethyl ketone

(D) Methanal

Option d – Methanal

Alkanones are less reactive than alkanals towards nucleophilic addition reaction due to ( SSLC Chemistry Previous Year Question )

(A) More steric hindrance of two alkyl groups

(B) More +I effect of two alkyl groups

(D) All of these

Option d – All of these

Formalin is used for the preservation of:

(A) Biological and anatomical specimens

(B) Butter

(D) Baked food

Option a – Biological and anatomical specimens

Methanal is available commercially as a solid polymer called ( SSLC Chemistry Previous Year Question )

(A) Metaldehyde

(B) Paraldehyde

(D) Aldimine

Option c – Paraformaldehyde

The compound that forms a yellow precipitate on heating with NaOH and iodine is:

(A) Propan-1-ol

(B) Propan-1-al

(D) Propan-2-ol

Option d – Propan-2-ol

Non-methyl ketones do not give a ( SSLC Chemistry Previous Year Question )

(A) Negative iodoform test

(B) Positive iodoform test

(D) Saytzeff’s test

Option b – Positive iodoform test

The most reactive compound towards nucleophilic addition reaction is:

(A) Methyl phenyl ketone

(B) p-nitrobenzene carbaldehyde

(D) p-toluadehyde

Option b – p-nitrobenzene carbaldehyde

The Haloform test is not shown by:

(A) Propanone

(B) Acetaldehyde

(D) sec.pentyl alcohol

Option c – ter.pentyl alcohol

Prop-2-en-1-al is the cross-condensation product of:

(A) Formaldehyde and acetaldehyde

(B) Acetaldehyde and acetone

(D) Formaldehyde and propionaldehyde

Option a – Formaldehyde and acetaldehyde

Aldol of ethanal is:

(A) But-3-en-1-al

(B) 3-Hydroxybutanal

(D) Acetal

Option b – 3-Hydroxybutanal

Formation of aldol condensation is a:

(A) Nucleophilic addition-elimination reaction.

(B) Electrophilic addition-elimination reaction

(D) Nucleophilic substitution reaction

Option d – Nucleophilic substitution reaction

2,4-Diphenyl but-2-en-1-al is the addition-elimination product of:

(A) Phenyl propanal

(B) Phenyl ethanal

(D) Acetophenone

Option b – Phenyl ethanal

Propionyl chloride on heating with sodium propionate produces:

(A) Propionic anhydride

(B) Propionic acetic anhydride

(D) Acetic anhydride

Option a – Propionic anhydride

Increasing order of acidic strength of carboxylic acids is: I) 2-Chloroethanoic acid II) Methanoic acid III) Propanoic acid IV) Ethanoic acid

(A) III < IV < I < II

(B) IV < I < III < II

(D) I < IV < II < III

Option a – III < IV < I < II

The strongest acid among the following is:

(A) 4-Methoxy benzoic acid

(B) 4-Nitrobenzoic acid

(D) Acetic acid

Option b – 4-Nitrobenzoic acid

Acetyl chloride is prepared by heating phosphorus trichloride with:

(A) Acetamide

(B) Acetic acid

(D) Ethanol

Option b – Acetic acid

Propanoic acid on heating with sulfonyl chloride produces:

(A) Propanoyl chloride

(B) n-Propyl chloride

(D) Propionamide

Option a – Propanoyl chloride

Acetic acid on heating with ethanol gives:

(A) Methyl propionate

(B) Ethyl acetate

(D) n-Propyl formate

Option b – Ethyl acetate

Fischer esterification is:

(A) Nucleophilic addition

(B) Nucleophilic substitution

(D) Electrophilic addition

Option b – Nucleophilic substitution

4-Methyl pent-3-pen-2-one is the aldol condensation product of:

(A) Acetaldehyde

(B) Propanone

(D) Ethyl methyl ketone

Option b – Propanone

2-Methyl propan-1-ol is obtained by reacting formaldehyde with:

(A) Ethyl magnesium bromide

(B) n-Propyl magnesium bromide

(D) Terbutyl magnesium bromide

Option c – Isopropyl magnesium bromide

Incorrect statement about the addition product of ethanal and sodium bisulphite is:

(A) They are water-soluble crystalline solids.

(B) They are hydrolyzed in aldehydes by dil. acids or alkali.

(D) They are sodium salts of hydroxy sulphonic acids.

Option c – They are water-insoluble liquids

Ethanal on reacting with ethyl alcohol in dry hydrochloric acid gas gives:

(A) Ketol

(B) Acetaldol

(D) Diacetaldehyde alcohol

Option c – Diethoxy ethane

The correct increasing order of the acid strength of (I) Benzoic acid (II) 4-nitrobenzoic acid. (III) 3,4-dinitrobenzoic acid and (IV) 4-methoxybenzoic acid is:

(A) I < II < III < IV

(B) II < I < I < III

(D) IV < II < I < III

Option c – IV < I < II < III

The reagent used to distinguish between acetaldehyde and benzaldehyde is:

(A) Tollen’s reagent

(B) Semicarbazide

(D) 2,4-dinitrophenyl hydrazine

Option c – Fehling’s solution

The reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by the elimination of water. The reagent is:

(A) A Grignard reagent

(B) Hydrazine in the presence of a feebly acidic solution

(D) Sodium hydrogen sulfite

Option b – Hydrazine in the presence of a feebly acidic solution

The product formed by the reaction of an aldehyde with a primary amine is:

(A) Ketone

(B) Carboxylic acid

(D) Schiff base

Option d – Schiff base

Least reactive toward acid-catalyzed dehydration is:

(A) Cyclohexanol

(B) Cyclohexyl methanol

(D) Cyclohex-2-en-1-ol

Option b – Cyclohexyl methanol

Sec. butyl alcohol on reacting with ethyl magnesium bromide in ether forms:

(A) 2-methyl pentane

(B) But-2-ene & propane

(D) 2-ethoxy butane

Option c – Sec butyl Mg bromide & ethane

Which of the following alkanols is most soluble in water:

(A) 1-Butanol

(B) 2-Butanol

(D) t-Butyl alcohol

Option d – t-Butyl alcohol

Which alcohol produces turbidity with Lucas reagent most slowly:

(A) 2-Butanol

(B) t-Butyl alcohol

(D) Diphenylcarbinol

Option c – Isobutyl alcohol

Alcohols oxidized to a ketone by chromic acid is:

(A) Phenol

(B) Cyclohexanol

(D) Benzyl alcohol

Option b – Cyclohexanol

Which of the following alcohols gives a red color in the Victor Meyer test:

(A) n-Propyl alcohol

(B) Isopropyl alcohol

(D) sec. Butyl alcohol

Option a – n-Propyl alcohol

Ethanol on heating with acetic acid in the presence of a few drops of sulfuric acid gives the smell of:

(A) Oil of wintergreen

(B) Oil of mustard

(D) Oil of bitter almonds

Option c – An ester

Which of the following does not turn the orange color of chromic acid to green:

(A) 1° alcohol

(B) 2° alcohol

(D) Allyl alcohol

Option c – 3° alcohol

When ether is exposed to air, which of the following products is formed:

(A) Oxide

(B) Alkanes

(D) Peroxide of diethyl ether

Option d – Peroxide of diethyl ether

Ketones can be prepared by:

(A) Rosenmund reduction

(B) Etard reaction

(D) Friedel-Craft reaction

Option d – Friedel-Craft reaction

In Liebermann’s nitroso reaction, sequential changes in the color of phenol occur as:

(A) Brown or red → green → red → deep blue

(B) Red → deep blue → green

(D) White → red → green

Option a – Brown or red → green → red → deep blue

When propanol is dehydrated, the product obtained is again hydrated and further oxidized to form a compound. The compound is:

(A) Propargyl alcohol

(B) Propanone

(D) Propane-1,2-diol

Option b – Propanone

When two moles of alcohol react with one mole of ketone, it gives:

(A) Hemiacetal

(B) Acetal

(D) Ketal

Option d – Ketal

Benzene diazonium chloride in reaction with phenol in a weakly basic medium gives:

(A) Diphenyl ether

(B) p-hydroxy azobenzene

(D) Benzene

Option b – p-hydroxy azobenzene

The compound which will readily couple with benzene diazonium chloride is:

(A) Benzoic acid

(B) Phenol

(D) Benzaldehyde

Option b – Phenol

Which of the following compounds shows intramolecular hydrogen bonding:

(A) p-Nitrophenol

(B) Ethanol

(D) Methenamine

Option c – o-Nitrophenol

Which of the following is the strongest acid:

(A) Carbolic acid

(B) Carbonic acid

(D) Acetic acid

Option c – Picric acid

The product obtained by the reaction of phenol with benzene diazonium chloride is:

(A) Phenyl hydroxylamine

(B) Para amino azobenzene

(D) Para hydroxy azobenzene

Option d – Para hydroxy azobenzene

p-Nitrophenol is a stronger acid than phenol because the nitro group is:

(A) Electron withdrawing

(B) Electron donating

(D) Acidic

Option a – Electron withdrawing

Phenol and benzoic acid are distinguished by:

(A) Lucas reagent

(B) Victor Meyer test

(D) Sodium bicarbonate

Option d – Sodium bicarbonate

Reimer-Tiemann formylation reaction involves the addition of:

(A) Chloroform on phenoxide ion

(B) Trichloromethyl carbanion on phenoxide ion

(D) Hydroxide ion on phenol

Option c – Dichlorocarbene on phenoxide ion

Nitration of phenol with conc. nitric acid gives:

(A) o-nitrophenol

(B) m-nitrophenol

(D) 2, 4, 6-trinitrophenol

Option d – 2, 4, 6-trinitrophenol

Phenol on treatment with methyl chloride in the presence of anhydrous AlCl3 gives chiefly:

(A) o-cresol

(B) m-cresol

(D) p-cresol

Option d – p-cresol

Deoxygenation of phenol can be achieved by distillation with:

(A) Raney nickel

(B) Lithium aluminum hydride

(D) Zinc dust

Option d – Zinc dust

Phenol can be distinguished from ethanol by reactions with the following:

(A) Iodine and alkali

(B) Ferric chloride

(D) Bromine

Option c – Acetyl chloride

Ether bottles should not be kept open in the air because:

(A) Ether is an anesthetic

(B) Ether forms an explosive peroxide

(D) Ether gets oxidized to ethanol

Option a – Ether is an anesthetic

In order to obtain diethyl ether from ethanol, the latter is taken in:

(A) In the equal amount of sulfuric acid

(B) In the slightly lesser amount of sulfuric acid

(D) In far lesser amount of sulfuric acid

Option c – In excess amount of sulfuric acid

Which of the following will not undergo Reimer-Tiemann reaction?

(A) Benzene

(B) Nitrobenzene