Question # 1

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

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

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

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

.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?

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pi-bond of C and O

Sigma bond of C and O

Sigma bond of C and H

Sigma bond of C and C

Acetaldchyde and ketone form addition product with

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Phenyl hydrazine

Hydroxylamine

Hydrazine

hydrogen cyanide

Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride?

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Amino group

Halide group

Hydroxyl group

Hydride group

Formalin contains-------% alcohol.

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37

80

8

52

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

2-propanol on Oxidation gives

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Aldehyde

Carboxylic Acid

Ketone

Alcohol

Consider the following reaction
R-CHO + 2Ag(NH3)2OH + R-COONH+ +2Ag+2NH3+H2OThis reaction represents

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Fehling test

Ninhydrin test

Benedict lest

Tollen's test

Which reactant does hnof liberate water on reaction with alcohol

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NH3

K2Cr2O7/15H2O

HCI

PCI3

Alcohols of low molecular weight are:

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Soluble in water

Insoluble in water

Soluble in water on heating

Insoluble in all solvents

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

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

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

Oxidation of secondary alcohol produces

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Aldehyde

Ketone

Alkyl halide

Ester

During esterifcation, the alcobol molecule acts as:

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Oxidizing agent

Electrophile

Reducing agent

Nucleophile

Which of the following test is not given by aldehvde

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2. 4 DNPH test

NaHSO3 test

Tollen's test

Sodium nitroprusside test

Which of the following does not give yellow precipitate with I2+ NaOH

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Acetone

Benzaldehyde

Acetildehyde

Acetophenone

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