Question # 1

Formation of Picric acid from phenol needs heating, one possible reason for it is

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acidity of phenol

e- donating nature of-OH

acidity of picric acid

e- with drawing effect of- NO2

Which alcohol is most reactive towards sodium metal?

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Ter Butyl alcohol

n-Propyl alcolol

Isopropyl alcohol

Have same reactivity

Alcohol is less acidie than phenol due to

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higher ka value

Instability of alkoxide ion

stability of carbocation

Stability of phenol

Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4

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I-propanol

2-Methyl-2-propanol

2-propanol

Ethanol

Which reagent is responsible for the conversion of ketone to secondar alcohul

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NaAlH

NaBH4

Al

Red P

The addition compound obtained by reacting acetaldelyde and HCN, when Iydrolyzed gives

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Ethyl alcohol

Methyl cyanide

2-Hydroxy propanoic acid

Ethyl cyanide

C=O and C=C bonds are differentiated by

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Hybridization of C-atom

Bond angles

Ammonical AgNO3

Conc. HNO3

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

The red brown ppt. of Fehling solution and benedict solution tests are of

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Ag

Cu2O

CuO

AgBr

An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K2Cr2O7/H2S04 the alcohol is

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CH3C(CH3)2OH

(CH3)3COH

CН3СН2СН2OH

(CH3)2CHOH

Which will not react with phenol

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NaOH

Br2

KMn04/OH-

Na

Which of the following will undergo nucleophilic addition reaction more easily?

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Aldehyde

Alkene

Aldehyde and ketone equally

Neither aldehyde nor alkenes

Which one of the followings is resistant to oxidation under normal conditions

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Methyl alcohol

Acetaldehyde

Ethyl alcohol

Acetone

A compound z' decolorizes bromine water and produces white ppt. The compound 'z'is

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Alkane

Alcohol

Phenol

Benzene

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Nucleophilic addition

Electrophilic substitution

Electrophilic addition

Nucleophilic substitution

The acidity of phenol is due to its

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Nature of Benzene

Double bond in benzene ring

Natute of phenoxide ion

Hydroxyl group

Which of the follwing dnes not give brick red precispitate wits Fehling's solution

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

Relative acidic strength of alcohol, phenol, water and carboxylie acid is

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Carboxylic acid > Alcohol > Phenol > Water

Carboxylic acid > Phenol > Water> Alcohol

Water > Alcohol> Phenol > Carboxylic acid

Phenol > Carboxylic acid > Alcohol> Water

The reaction of formaldehyde with HCN is

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Nucleophilic substitution

Electrophilic substitution

Nucleophilic addition

Free radical addition

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

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