Question # 1

Chlorine when attached to benzene has

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+1 and + R effect

-1 and - R effect

-1 and +R effect

None of the above

Oxytocin, a pituitary hormone to

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Amino acid

Polypeptide

Protein

Conjugated protein

2- Butanol is optically active because a contains

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An asymmetric carbon atom

A plane of symmetry

Centre of symmetry

A hydroxyl group

The bond length of C = C is

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1.20 A^o

1.34 A^o

1.54 A^o

1.68 A^o

Which of the following techniques is involved in purification of organic compound.

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Distillation

Sublimation

Solvent extraction

All above

Indigotin is a dye obtained from indigo plant which belongs to the group of.

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Substantive dyes

Mordant dyes

Vat dyes

Disperse dyes

Phosphorus is detected by fusing the organic compound with -------followed by extraction with H2O

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HNO3

H2SO4

Sodium per oxide

Ozone

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

The reagent which can be used to distinguish acetophenone from benzophenone is.

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2,4 -dinito phenyl hydrazine

Li AIH4

Benedict reagetn

I2 and Na2CO3

Arrangement of peptide chains of protein in spec to form helix stucture is referred to as.

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Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

The criteria for aromatically is presence of

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Uneaturations

Cyclic structure

Presence of 4nx electrons

Presence of 4n + 2n electrons

The decomposition of dimethyl ether at 504 oC is first order with a half -life of 1570 second. What fraction of an initial amount of dimethyl ether remain after 47-10 seconds.

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1/3

1/6

1/8

1/16

The number of hydrogen bond present in G -C pair is

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1

2

4

3

Which of the following is not a naturally occurring dye.

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Indogo

Indigotin

Alizarin

Malachite green

The unit of nucleic acid having base sugar combination is called.

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Nucliec acid

Nucleoside

Nucleotide

None of these

What is the activation energy of a reaction whose rate constant increases by a factor of 100 upon increasing the temperature from 300 K to 360 K.

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27

35

42

69

The formation of daughter DNA's from parent DNA is called.

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Transalation

Transcription

Reproduction

Replication

Trimethylamine is a weaker base than dimethylamine is explained by

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Steric effct

Resonance effect

Inductive effect

All above

For a compound to act as a dye it must have

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A suitable colour

Ability to fix to fibre

Both A and B

None of these

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

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