Question # 1

In a crystal the atoms are locate at the position of:

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infinite potential energy

minimum potential energy

Zero potential energy

maximum potential

One degree on Celsius scale is ______ time greater then Fahrenheit scale

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9/5

5/9

6/5

5/6

Irreversible precipitation of protein caused by heating is called

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Polymerization

Denaturing

Inversion

Co-angular

For better or worst we are living in society:

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wood

food

diseased

plastic

At present the number of cement factories is Pakistan are

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20

22

25

30

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

The structure of a polymer depends upon how the monomer-repeating unit joins to makes a polymer, What is not the type of structure of a polymer?

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synthetic polymer

linear polymer

branched

cross linked or inter connected polymer

A single chlorine free radical can destory how many ozone molecules

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10

100

1000

10000

Which one of the following is the most abundant organic substance found in nature?

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fructose

starch

glucose

cellulose

The most important pesticides are:

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Herbicides

Insecticides

Fungicides

All

One Joule is equivalent to

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4.184 cal.

0.4184cal.

1/2 cal.

1/4.184 cal

Ether show the phenomenon of :

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Position isomerism

Functional group isomerism

Metamerism

Cis-trans isomerism

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

A solution is a homogeneous mixture of two or more kinds different :

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Molecular.

Covalent substance

Ionic Substances

Both (a) and (c)

Which one of the following will have the maximum dipole moment

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CH₃F

CH₃Cl

CH₃Br

CH₃l

The apex angle of the folded filter paper is slightly greater is termed as:

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60 degree

30 degree

45 degree

90 degree

Cell potential depends upon :

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Concentration of ions

Nature of electrolyte

Temperature

All of above

Which is an essential constituent of chlorophyll

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Be

Fe

Mg

Ca

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K_p> K_c

K_c> K_p

K_p= K_c

None of these

Hydrolysis of an ester gives a carboxylic acid which on Kolbe's electrolysis yields ethane. the easter is

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Ethyl methonoate

Methyl ethanoate

Propylamine

Ethylamine

The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

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Electroplating

Electrolysis

Conduction

Induction

On the basis of VSEPR theory SO₂is a

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Liner molecule

A bent molecule

A strong molecule

A gaseous molecule

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