Question # 1

In the presence of dilute alkali monosaccharides undergo reversible isomerisation . The reaction known as.

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Kiliani reaction

Weermann rearrrangement

Lobry do Bruyn Van Ekenstein rearrangement

Mutarotation

In which of the following group, each member given a positive iodoform test.

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Methanol, ethanol, propanone

Ethanol, isopropyl alcohol, methanol

Ethanol, ethanal, isopropyl alcohol

Propanal 2-propanol, propanone

A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is

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n-butane

n-propane

n-pentane

n-hexane

The dye which is a constituent of Skiffs reagent used for detection formaldehyde group is.

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Gentain violet

Megneta

Phenolphthalein

Rosolic acid

The IUPAC name of ethylene oxide is.

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Epoxy methane

Oxcethene

Methoxymethane

All of the above

The binding site on ribosome t-RNA and m-RNA is provided by

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Polysome

Ribosomal RNA

Codone

DNA

The reason why phenylamine is a much weaker base tahn ammonia when each is in aqueous solution to that.

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Teh ion pair of electron on two nitrogen atom of phenylamine is delocalised over the benzene ring.

The phenylamine molecule is too large to capture hydrogen ion easily

Phenylamine is much less soluble is water than is ammonia

The benzene ring has a tendency to increase the acidity of its substituents.

When FeSO4 is added in the sodium extract the compound formed is.

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Only Na4[Fe (CN)6]

Only Fe (OH)2

Only Na2So4

Mixture of all these

The function of boiling the sodium extract with conc. HNO3 before testing the halogens is

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To make solution clear

To make the solution acidic

To bring common ion effect

To destroy CN- and S2- ion

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

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

Which of the following haloacids is stronger acids.

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FCH2COOH

ClCH2COOH

Br CH2COOH

ICH2COOH

In propagation step the reaction intermediate of radical polymerization is

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Carbocation

Carbonion

Free radical

Carbene

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

Which type of polymer the Nylon -06 is

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Polyamide

Polyester

Addition

Homopolymer

Which of the following is strong adheaive.

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Epoxy resin

Melamine -formadehyde resin

Alkyd resins

Bakelite

It is possible to distinguish between optical isomers.

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Using chemical tests

By mass spectrometry

By IR spectroscopy

By polarimetry

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

Which of the following does not belong in the group of herocyclic dyes.

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Acridine

Cyanine

Methylene blue

Amido black

Alkyl cyanide and alkyl isocyanides are

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Tautomers

Metamers

Functional isomers

None of the above

Which of the following is used to make non-stick material.

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Vinyl cyanide

Tetrafluoroethene

Vinyl chloride

Styrene

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