Question # 1

SAN is a polymer of

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Styrene

Acrylonitrile

Both A and B

Vinyl chloride

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

Which of the following statements is not correct. with respect to resonance.

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The position of atomic nuclei mus be same

The limiting structures must have same number of paired and unpaired electrons.

The energy of the various limiting structures must contribute equally

All above

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

A correct reaction mechanism for a given reaction usually is.

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The same as the balanced chemical equation

Obvious if its heat of reaction is known

Sometimes difficult to prove

Obvious if the activation energy is known

When alkyl iodidies are decomposed by light then the product obtained is.

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R - R

R - H

RCH2I

RCHI2

Polyamide jinkage is present in

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Nylon

Silk

Protein

All of these

If the activation energy in the forwarded direction of an elementary step is 52 kj and the activation energy in the reverse direction is 74 kj. What is the energy of reaction Delta E for this step

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22 Kj

-22 kj

52 kj

-52 kj

Which of the following does not represent Lewis base.

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Pyridine

NaNH2

PCl3

NaOH

Monomer of natural rubber is

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1,3-Butadiene

2-Methyl -1,3-butadiene

1,2 -Butadiene

1,3 - Pentadiene

Which of the following compound will be optically active.

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Suceinic acid

Meso tartaric acid

Acetic acid

Lactic acid

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

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

Which type of polymers the Vulcanised rubbers is.

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Linear

Cross jinked

Branch chain

Any one of these

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

High density polyethylene has which type of structure.

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Linear

Branch chain

Cross linked

Any one of these

Given A + 3B ____________ 2C + D

This reaction is first under with respect to reactant A and second order with respect to reactant B . If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by factor of _____________

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Increase ,2

Decrease ,2

Increase ,4

Decrease ,4

According to R, S system the correct order of priority of the following groups is .

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-CH2OH > - CHO > ----- COOH

-COOH > ------CHO > ------CH2OH

---- CH2OH -----> - COOH > -------CHO

--- COOH > - CH2OH >----- CHO

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 number of optically active compounds in the isomers of C3H5Br3 is.

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1

2

3

4

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