Question # 1

When purely alcoholic solution of sodium/potassiumhydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?

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Elimination

Debromination

Dehydration

Reduction

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

Which of the following solids does not have a covalent bond?

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Silica

Copper

Diamond

Graphite

Benzene cannot undergo the ------- directly

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

The solid particles posses only ______ kinetic energy

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Translational

Rotational

Viberational

Circular

The number of paper industries in Pakistan are

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30

25

35

20

All of the following are hydroxy containing amino acids except

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Serine

Threonine

Valine

Tyrosine

Which one of the following is not true relationship

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The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

The maximum oxidation state of Mn is

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+6

+7

+5

+4

The coordination number of iron in [Fe(H₂O)₆]³⁺is

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2

3

4

6

The formula of secondary alcohol is

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R - OH

R - CH₂OH

R₂CHOH

R₃COH

Glacial acetic acid freezes to ice like solid it.

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07

17

27

37

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

Which of the following mixture of liquids show negative deviation form Raults law

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Ethyl alcohol and ether

HCI and water

Phenol- water

Chlorobenene-bromobenene

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

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O₂, H₂

O₂, Na

O₂, SO₂

O₂, S₂O₈²

The reaction between primary amine-chloroform and alcoholic caustic potash is called

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Wurtz reaction

Frankland reaction

Cannizzaro's reaction

Carbylamine reaction

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

Urea has concentration when prepared before prlilling:

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46%

82%

99.7%

100%

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Proton donar

Dehydrating agent

Catalyst

Electrophile

Which of the following elements does not show variable oxidation states?

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Copper

Iron

Zinc

Titanium

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