Question # 1

Which of the following statement is false about resonance.

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It increase the stability of a molecule

It leads to similar type of bonds

It increase the reactivity of the molecule

It decrease the reactivity of the molecule.

Hydrocarbon X (C6H12) on oxidation with hot alkaline (KMnO4) gives a mixture of prop ionic acid and dimethyl ketone. The structure of compound X is

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CH3CH = CHCH2CH2CH3

(CH3)2 C = CH CH2 CH3

CH3CH2CH = CHCH2CH3

(CH3)2 C = C (CH3)2

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

Which of the following effects best explains that o-nitro phenol is insoluble in water.

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Inductive effect

Resonance effect

Intramolecular H -bonding

Isomeric effect

The IUPAC name of HCOOCH3 is.

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Methoxy methanol

Ethanoic acid

Methyl methanoate

Methoxy methane

Iodination of benzene takes place in the presence of iodine and

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HNO3

HIO3

HgO

All of these

Which type of polymer the Nylon -06 is

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Polyamide

Polyester

Addition

Homopolymer

Which of the following reaction cannot be used for the synthesis of a amino acids.

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Gabriel phthalimide

Streckers synthesis

Sorensen synthesis

Schmidt synthesis

Hydrolysis of nucleoprotein result in the formation of.

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Proteins

Nucleic acids

Both A and B

They do not hydrolyse

Correct order of increasing ______ I effect of groups is

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----- NO2 >-----------CN > ------------COOH > -------------F

--------F > -------------COOH>----------CN>--------NO2

-----F> -------------CN>--------NO2 > COOH

-------CN > ------------COOH > -----------NO2 >----------F

In which polymer the strength of inter molecular forces is maximum

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Elastomers

Thermoplastic

Fibre

Cross linked polymer

Which of the following statements regarding phenols is not correct.

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Phenol ls are stronger acids than water and alcohols.

Phenol are weaker acids than carboxylic acids

Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate

Phenoxides ions are more stable than the corresponding phenol

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

According to R, S system the correct order of priority of the following groups is .

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-CH2OH > - CHO > ----- COOH

-COOH > ------CHO > ------CH2OH

---- CH2OH -----> - COOH > -------CHO

--- COOH > - CH2OH >----- CHO

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Which of the following property has a higher value for trans isomer as compared to cis isomer.

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Density

Dipole moment

Melting point

Boiling point

The stationary and mobile phases in paper chromatography are.

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^{Liquid/Liquid}

Solid /Liquid

Liquid/Solid

Gas/solid

The dye obtained from madder root

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Indogotin

Indanthrene

Alizarin

Acriflavin

C is -2 butene on reaction with bromino give 2,3 -dibromobutane which is

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Recemic mixture

Meso isomer

Dextoroisomer

Levoisomer

The molar mass of an organic acids is determined by

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Depression of freezing point

Elevation of boiling point

Volumetric method

Victor Myer's method

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