Question # 1

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

Hydrogen bons holding the strand to nucleic acids are formed between

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Sugar and base units

Base unit

Sugar ane phosphate units

Sugar units

Which of the following dye is used an antiseptic .

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Methyl orange

Mercurochrome

Alizarin

Bismarck brown

The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.

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Primary structure

Secondary structure.

Tertiary structure

Quaternary structure.

Which of the following statements is false about enantiomers.

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Rotate plane of polarized light

Are superimposable mirror images

Nbonsuperimposable mirror images

All of the above

Which of the following does not represent Lewis base.

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Pyridine

NaNH2

PCl3

NaOH

In order to give strength and elasticity natural rubber is heated with.

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Sulphur

Oxygen

Nitrogen

Chlorine

Dyes used in photographic plates to make them panchromatic is.

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Cyanine dyes

Azine dyes

Phthalocyanine dyes

Acridine dyes

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

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Transalation

Transcription

Reproduction

Replication

Monomer of natural rubber is

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1,3-Butadiene

2-Methyl -1,3-butadiene

1,2 -Butadiene

1,3 - Pentadiene

Hydrolysis of protein gives

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a -amino acid only

b-amino acids only

gama amino acid only

A mixture of all of these

Ingold's isoprence rule states that in terpenoids isopren units are joined.

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Head to tail

Head to head

Tail to tail

In a random order

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

The IUPAC name of C2H3, CO , OC OC2H5 in

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Prepanoic anhydride

Ethanoic anhydride

Diketoethoxy ether

None of the above

Oxidative enzymes are responsible for

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Biological processes

Biological oxidation

Biological hydrolysis

Biological isomerisation

Which of the following haloacids is stronger acids.

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FCH2COOH

ClCH2COOH

Br CH2COOH

ICH2COOH

An example of nitro dyes is.

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Martius yellow

Auramine O

Malachite green

Methyl red

High density polyethylene has which type of structure.

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Linear

Branch chain

Cross linked

Any one of these

Which of the following is not a characteristics of terponoids.

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They are pleasant smelling liquids

They are steam volatile

They are nitrogenous bases

They are insoluble in water

The speed of a chemical reaction

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Is constant no matter what the temperature is.

Is independent of the amount of contact surface of a solid involved

Between gases should is all cases be extremely repid because the average kinetic energy of the molecules is great

Between ions in aqueous solution is extremely rapid because there are no bonds that need to be broken

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

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Acridine

Cyanine

Methylene blue

Amido black

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