SSLC Chemistry Previous Year Question Paper

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SSLC Chemistry Previous Year Question Paper for Students

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.

(C) Electron-attracting nature of oxygen atoms.

(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

(C) p-Methyl benzaldehyde

(D) p-Nitro anisole

Option c – p-Methyl benzaldehyde

Dodecanal is the partial reduction product of:

(A) Ethyl decanoate

(B) Methyl dodecanoate

(C) Dodecyl cyanide

(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

(C) Methyl cyanide

(D) n-Propyl magnesium bromide

Option d – n-Propyl magnesium bromide

By Rosenmund reduction, aldehydes are prepared from:

(A) Alcohols

(B) Carboxylic acids

(C) Acyl chlorides

(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.

(C) Alkanals are not oxidized into alkanoic acid, whereas ketones can.

(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

(C) Wolf Kishner 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

(C) Dry ketone

(D) Carbon monoxide

Option a – Dry ice

Benzoic acid is obtained by:

(A) Reduction of benzamide

(B) Oxidation of benzoyl chloride

(C) Reduction of phenyl cyanide

(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

(C) 2-Methyl butyl 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

(C) Cyclohex-1,4-diene

(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

(C) Strong bond between carbon and oxygen

(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

(C) Steam distillation

(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

(C) 17 to 28

(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

(C) Two

(D) One

Option b – Three

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

(A) Electrophilic substitution

(B) Electrophilic addition

(C) Nucleophilic addition

(D) Nucleophilic substitution

Option c – Nucleophilic addition

The most reactive compound toward nucleophilic addition reaction is:

(A) Ethyl methyl ketone

(B) Dimethyl ketone

(C) Ethanal

(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

(C) Less electron-deficient nature of carbonyl carbon

(D) All of these

Option d – All of these

Formalin is used for the preservation of:

(A) Biological and anatomical specimens

(B) Butter

(C) Chewing gum

(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

(C) Paraformaldehyde

(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

(C) Butan-2-amine

(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

(C) Bayer’s 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

(C) Benzene carbaldehyde

(D) p-toluadehyde

Option b – p-nitrobenzene carbaldehyde

The Haloform test is not shown by:

(A) Propanone

(B) Acetaldehyde

(C) ter.pentyl alcohol

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(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

(C) Acetaldehyde and propionaldehyde

(D) Formaldehyde and propionaldehyde

Option a – Formaldehyde and acetaldehyde

Aldol of ethanal is:

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

(B) 3-Hydroxybutanal

(C) 2-Hydroxybutanal

(D) Acetal

Option b – 3-Hydroxybutanal

Formation of aldol condensation is a:

(A) Nucleophilic addition-elimination reaction.

(B) Electrophilic addition-elimination reaction

(C) Free radical substitution 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

(C) Diphenyl ketone

(D) Acetophenone

Option b – Phenyl ethanal

Propionyl chloride on heating with sodium propionate produces:

(A) Propionic anhydride

(B) Propionic acetic anhydride

(C) Propyl propionate

(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

(C) II < III < I < I

(D) I < IV < II < III

Option a – III

The strongest acid among the following is:

(A) 4-Methoxy benzoic acid

(B) 4-Nitrobenzoic acid

(C) Benzoic acid

(D) Acetic acid

Option b – 4-Nitrobenzoic acid

Acetyl chloride is prepared by heating phosphorus trichloride with:

(A) Acetamide

(B) Acetic acid

(C) Ethanal

(D) Ethanol

Option b – Acetic acid

Propanoic acid on heating with sulfonyl chloride produces:

(A) Propanoyl chloride

(B) n-Propyl chloride

(C) Propanoic anhydride

(D) Propionamide

Option a – Propanoyl chloride

Acetic acid on heating with ethanol gives:

(A) Methyl propionate

(B) Ethyl acetate

(C) Butyric acid

(D) n-Propyl formate

Option b – Ethyl acetate

Fischer esterification is:

(A) Nucleophilic addition

(B) Nucleophilic substitution

(C) Electrophilic 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

(C) Propionaldehyde

(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

(C) Isopropyl 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.

(C) They are water-insoluble liquids.

(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

(C) Diethoxy ethane

(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

(C) IV < I < II < III

(D) IV < II < I < III

Option c – IV

The reagent used to distinguish between acetaldehyde and benzaldehyde is:

(A) Tollen’s reagent

(B) Semicarbazide

(C) Fehling’s solution

(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

(C) Hydrocyanic acid

(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

(C) Aromatic acid

(D) Schiff base

Option d – Schiff base

Least reactive toward acid-catalyzed dehydration is:

(A) Cyclohexanol

(B) Cyclohexyl methanol

(C) 1-methyl cyclohexan-1-ol

(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

(C) Sec butyl Mg bromide & ethane

(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

(C) Isobutyl alcohol

(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

(C) Isobutyl alcohol

(D) Diphenylcarbinol

Option c – Isobutyl alcohol

Alcohols oxidized to a ketone by chromic acid is:

(A) Phenol

(B) Cyclohexanol

(C) Cyclohexyl methanol

(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

(C) (CH3)3C-OH

(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

(C) An ester

(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

(C) 3° 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

(C) Alkenes

(D) Peroxide of diethyl ether

Option d – Peroxide of diethyl ether

Ketones can be prepared by:

(A) Rosenmund reduction

(B) Etard reaction

(C) Cannizzaro 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

(C) Red → green → white

(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

(C) Ethylene-1,2-diol

(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

(C) Hemiketal

(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

(C) Chlorobenzene

(D) Benzene

Option b – p-hydroxy azobenzene

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

(A) Benzoic acid

(B) Phenol

(C) Benzene

(D) Benzaldehyde

Option b – Phenol

Which of the following compounds shows intramolecular hydrogen bonding:

(A) p-Nitrophenol

(B) Ethanol

(C) o-Nitrophenol

(D) Methenamine

Option c – o-Nitrophenol

Which of the following is the strongest acid:

(A) Carbolic acid

(B) Carbonic acid

(C) Picric 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

(C) Phenyl hydrazine

(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

(C) Basic

(D) Acidic

Option a – Electron withdrawing

Phenol and benzoic acid are distinguished by:

(A) Lucas reagent

(B) Victor Meyer test

(C) Caustic soda

(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

(C) Dichlorocarbene 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

(C) p-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

(C) anisole

(D) p-cresol

Option d – p-cresol

Deoxygenation of phenol can be achieved by distillation with:

(A) Raney nickel

(B) Lithium aluminum hydride

(C) Sodium borohydride

(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

(C) Acetyl 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

(C) Ether is costly

(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

(C) In excess 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

(C) Benzaldehyde

(D) All of these

Option d – All of these

Reimer-Tiemann reaction is shown by:

(A) Benzene

(B) Phenol

(C) Nitrobenzene

(D) p-nitrobenzaldehyde

Option b – Phenol

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