Question # 1

Which of the following class of compounds follow the criteria of aromatically.

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The compounds must have high degree of unsaturation

they must have the property to undergo addition reactions

They must have the property to undergo substitution reactions

They must have the ability to sustain an induced current in NMR

The terpenoid responsible fo the smell

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Camphor

Genenial

Citral

Carvone

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

A terpenoid which has as alcoholic group in the molecule is.

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Citral

Camphor

Menthol

Carvone

Which of the following statements is not correct with respect to applications of H- bonding.

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It explains the usual b.p. and m.p of certain class of compound.

It explains the solubility of certain organic compounds in hydroxylic solvents

It explains the lack of ideal behavior in gases and solutions

It has stonrg influence on the configuration of certain molecules.

A catalyst

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Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

a- pinene hydrochloride on warming rdarranges to form bornyl chloride.The rearrangement is known as.

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Pinacol pinacolone

Hofinann

Wager Mecrwein

Wolff

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

Which of the following is most basic.

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Aniline

Benzylamine

Diphenylamine

N-methylaniline

An example of nitro dyes is.

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Martius yellow

Auramine O

Malachite green

Methyl red

Which of the following haloacids is stronger acids.

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FCH2COOH

ClCH2COOH

Br CH2COOH

ICH2COOH

a -amino acids when heated alone form

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Cyclic lactum

a-b-unsaturated acid

Fatty acids

Diketopiperzines

The ease of hydrohalogenation of alkyl halide with alcoholic KOH is.

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3^o > 2^o > 1^o

3^o < 2_o <1^o

3^o > 2^o < 1^o

3^o < 2 ^o > 1^o

Rectified spirit obtained by formentation contains 5% of water .So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated Benzene helps because.

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It is dehydreating agent and so removes water

It forms the loweer layer which retains all the water so that alcohol can be distilled off

It form an azeotropic mixture having high boiling point and thus allows the alcohol to distall over

It forms low boiling azeotropic mixture which distille over leaving behind pure alcohol which can than be distilled.

Primary structure of protein refers to

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Amino acid sequence

Arrangement of peptide chains

Orientation of amino acids

Whether is has a or b helix in space structure.

An auxochrome is a group which

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Absorbs in UV region

Absorbs in visible region

Absorbs in IR region

Increase absorption wavelength of chromophore

Which of the following is not a biodegradable polymer.

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Protein

PVC

Cellulose

Nucleic acid

An example of acrylic monoterpenoid is

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Dipentene

Myocene

a- terpineol

Limonene

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