Question # 1

Soft drinks and baby feeding bottles are generally made up

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Polyeater

Polyurethens

Polyamide

Polyetyrene

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

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

Which of of the following statement is not correct in respect of

Arrhenius concept.

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This concept is applicable only for aqueous systems.

Neutralization takes place in aqueous medium only

H+ ion concept remain as such in water

This concept is applicable for non aqueous system only.

When the colourless liquid chlorobenzene is shaken with bromine water, the chlorobenzen becomes a yellow-orange colour. Which of the following is the best interpretation of this.

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An addition compound of chlorobenzene and bromine has been formed.

The chlorine atom has been replaced by a bromine atom

The bromine is mor esoluble in chlorobenzene than in water

A hydrogen atom has been replaced by a bromine atom

Different arrangement of groups in space which can be converted into one another by rotation around a single bond are caled.

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Conformations

Metameres

Enatiomers

All of the above

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

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Acridine

Cyanine

Methylene blue

Amido black

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 strong adheaive.

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Epoxy resin

Melamine -formadehyde resin

Alkyd resins

Bakelite

D(+) glyceraldebydes has the absolute configurtion.

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E-

S-

E-

Z-

In which polymerization branching of chain cannot be possible.

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Free radical

Cationic

Anionic

Anionic and Zieglar Natta

Monomer of Nylon -6 is

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Adipic acid

Hexamethylenediamine

Caprolactam

All of these

The bond angle between hybrid orbitals in methane is

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115.5^o

109.5^o

105,7^o

120^o

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

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HNO3

H2SO4

Sodium per oxide

Ozone

Stereotsomers not related to each other as object and minor image are called.

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Enantiomers

Diastereolsomers

Conformations

Antipodes

Which one of the following is natural polymer.

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Starch

Nylon-6

Neoprene

Buna-S, SBR

Cytosine a pyrimidine base pairs with

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Guanine

Thymine

Adenine

Any of these

When of the following steps is involved in structure determination of an organic compound.

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Purification of compund.

Qualitative and quantitative analysis of elements present

Determination of molar mass

All above steps

Which of the following is capable of forming zwitter ion.

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Amino acids

Halo acids

Hydroxy acids

All of these

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.

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

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