Question # 1

Ethanol is prepared in Pakistan form fermentation of:

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Starch

Sugar

Glucose

Molasses

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

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Sodium salicylate

Salicyl aldehyde

Catechol

Benzoic acid

Derivative of water is:

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Alcohals

Phenols

Either

Phenol

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃-O-CH₃

C₂H₅OH

Diethyl ether is obtained by Williamsons synthesis using

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Ethanol + Na + C₂H₅Br

Ethanol + Mg + C₂H₅Br

Methanol + Na + CH₃Br

Methanol + Mg + CH₃Br

The order of reactivity of halogen acids for reaction with C₂H₅OH is

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HCl > HBr > HI

HI > HBr > HCl

HBr > HI > HCl

HBr > HCl > HI

Maximum number of active hydrogens are present in

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Acetic acid

Glycerol

Methane

Methanol

Which of the following is the most suitable method for removing the traces of water from ethanol?

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Reacting with Na metal

Passing dry HCl through it

Distilling it

Reacting with Mg

According to Lewis concept ethers behave as:

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Acid

Base

Acid as well as a base

None of them

Which of the following process is employed to convert alkyl halide into alcohol?

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Addition

Substitution

Dehydrohalogenation

Molecular rearrangement

Either, an organic compound has close resemblance in structure and thus a derivative of:

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Water

Oxides of lithium

Oxides of magnisium

Oxides of aluminium

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1-bromobutane

2-bromobutane

1-bromo-2-methyl propane

2-bromo-2-methyl propane

Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch

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Diastase

Maltase

Zymase

Invertase

Alcohols, phenols and ethers may be considered as derivative of

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Hydrocarbons

Benzene

Carboxylic acid

Water

Dehydration of ethyl alcohol yields

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Aldehyde

Ketone

Acid

Alkene

Methyl alcohol is not used:

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As a solvent

As an anti-freezing agent

As a subsitution for petrol

For denating of ethyle alcohal

which enzyme is not involved in the fermentation of starch ?

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Diastase

Zymase

Urease

Invertase

Which compound is more soluble in water?

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C₂H₅OH

C₅H₅OH

CH₃OCH₃

n-Hexanol

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

95% alcohol is called

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Rectified spirit

Spirit of wine

Spirit

Methylated

Absolute alcohol is obtained by adding rectified apirit in alcohol:

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Water

Na₂CO₃

NaOH

CaO

The boiling points of alcohols are higher than the corresponding alkanes, This is because

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Of hydrogen bonding existing between molecules of alcohols

Alkanes are dipolar compounds

Alcohols are sweet in taste

Alcohols are soluble in water

Dehydration of an alcohol at 180°

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Alkene

Ether

Ester

An hydride

Which compound contains - OH in their molecule

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Alcohol

Phenol

Alcohol and phenol

Ether

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

In its reaction with Na, 1 mol of X gives 1 mol of H_2(g). What is X

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CH₃CH₂CH₂CH₂OH

(CH₃)₃COH

CH₃CH₂CH₂CO₂H

CH₃CH(OH)CO₂H

When alcohol reacts with concentreated H₂SO₄intermediate compound formed as

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carbonium ion

alkoxy ion

alkyl hydrogen sulphate

non of these

C₂H₅OH can be differentiated from CH₃OH by

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Reaction with HCl

Reaction with NH₃

Iodoform test

Solubility in water

The malt-sugar in the presence of yeast or invertase gives

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Fructose

Glucose

Lignin

Alcohol

Alcohals can be distinguished using test:

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Lucas

Tollen's

Koib's

William's

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

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CH₃OH

CH₃CHO

CH₃CH(OH)CH₃

CH₃COCH₃

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