Question # 1

Surfactants are organic compounds; used in detergents which reduce the

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viscosity of water

surface tension of water

boiling point of water

wetting ability of water

COD of water can be measured by

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Cr₂O₃

Cr₂O₄^-2ions

Cr₂O₇^-2ions

None of these

One of the following is not a biopolymer,Point out that one:

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lipid

starch

diamond

protein

Micro nutrients are required in quality ranging from:

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4g - 40g

6g - 200g

6dg - 200kg

4kg - 40kg

When ethyl magnesium bromide is treated with carbon dioxide and the product hydrolyzed we get

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formic acid

propionic acid

oxalic acid

acetic acid

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Acohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

If the rate of the reaction is equal to the rate constant, the order of the reaction is

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3

1

0

2

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy?

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50000

20000

100000

10000

In homocyclic compounds the ring consists of

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Carbon and oxygen atoms

Carbon and nitrogen atoms

Only carbon atoms

Carbon atoms with one hetero atom

Classification of polymerization into two types was suggested by

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W.H Carothers

Staudinger

OSwald

Aspdin

When the temperature is raised, the viscosity of the liquid decreases.This is because of

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Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between the moelcules

Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to

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Alkynes

Alkenes

Alkanes

Alcohol

The number of paper industries in Pakistan are

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30

25

35

20

Alkenes combine readily with electrophillic reagents such as halogens giving

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Haloalkanes

Gem-dihalides

Vicinal dihalides

Vinyl halides

Alcohol reacts with halogen acid to produce

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Alkyl halides

Aldelydes

Ketones

Alkanes

Increased asthmatic attacks in certain seasons are related to

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Inhalation of seasonal pollen

Eating of seasonal vegetables

Low temperature

Wet and dry environment

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

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Increases

Decreases

Reaming same

Orbits coincide

The order of reactivity for a given halogen in Grignard's reagent is:

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CH₃X > C₂H₅X > C₃H₄X > C₄H₄X

C₂H₅X > C₃H₇X > C₄H₅X > CH₄X

C₃H₇X > C₄H₇X > CH₃X > C₂H₅X

C₄H₄X > C₃H₇X > C₂H₅X > CH₄X

B-atom in BF₃has

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sp³hybridization

sp²hybridization

sp hybridization

no hybridization

The Zwitter ion is also called

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International salt

Internal salt

No salt

None of these

Polythene is a polymer of

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Ethane

Ethene

Acetone

Propylene

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