Question # 1

Which one of the following compound is not of a polymer.

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Starch

Glucose

Protein

Nylon -6, 6

In fluorescent tube, the gas filled is.

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He

Ne

Ar

Xe

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Which one of the following species is meta director if present at benzene ring.

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-NO2

-Cl

-CH3

-OH

Which process of pulp making is mostly used in Pakistan.

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Kraft process

Sulphite process

Neutral sulphite semi chemical process

Wet process

silicones are

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Some salts of sodium

Allotropes of SI

Inorganic polymers

Coloured compounds of Si

Keeping in view size of atoms ,which order is the correct one.

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > I

Venyl acetylene combines with HCl in

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Polyacetylene

Benzene

Chloroprene

divinyl acetylene

For ----------------- Mechanism, the first step involved is the same

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E1 and E2

E2 and S_N2

S_N1 and S_N2

E1 and S_N1

Stability of halogen molecules decreases from

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F2 to I1

Cl2 to I2

I2 to F2

I2 to Cl2

Photochemical smog mainly consist of

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Higher hydrocarbons

Oxidising agnts

Reducing agent

All of these

An ester can be prepared by the reaction of.

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Two alcohols

Alcohol and an aldehyde

An alcohol and an organic acid

an acid and a ketone

Phenol can be prepared from chlorobenzene by

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Williamson synthesis

Down's process

Kolbe reaction

Cannizzaro reaction

The number of peptide bonds in dipeptide is

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0

1

2

3

Which one of the following gases is used for artificial ripening of fruits.

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Ethene

Ethyne

Methane

Propane

The isomers having same functional group but different alkyl group on either side of functional group are called.

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Metamers

Polymers

Monomers

Homologous series

Which of the following acids possess oxidizing and reducing properties.

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HCl

HNO2

HNO3

H2SO4

Which of the follow8ing is not a fatty acid.

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Propanoic acid

Acetic acid

Phthalic acid

Butanoci acid

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