Question # 1

In which molecule carbon atom is sp²hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with

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Any aromatic amine

Any primary amine

Any amine

Any aliphatic amine

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Use of ethanol as:

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Drink

Solvent and fuel

In beverage

All of these

Reaction of Grignard's reagent with formaldehyde gives:

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pri-alcohol

sec-alcohol

ter-alcohol

carboxylic

Zn + HCI are used in

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Clemenson reduction

Wof kishner reduction

Kolb's electrolysis

Wutruz reaction

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Catenation is a process in which carbon shows the properties of making

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Multiple bonds

Hybridization

Long chains or rings of carbon atom

Showing isomerism

The sun of all the energies of atoms, molecule, ion, within system is called

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Enthalpy

K.E. of the system

Internal energy

None

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

Physical properties of alkanes increase with increase of all physical constants except

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Boiling points

Melting points

Density

Solubility

Acetylene had a characteristic ethereal smell resembling that of

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Ginger

Vinegar

Garlic

Onion

Which of the following nitrogen fertilizer contains more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Which of the following compounds on oxidation gives benzoic acid?

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Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

Down's cell is used to prepare

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

At present oil refineries in Pakistan are:

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One

Two

Three

Four

Which of the following is the hardest metal among following

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Li

Na

Rb

K

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

Without proper suction,filtration is:

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Rapid process

Fague process

Slow process

Useless process

The correct set of quantum numbers (n,l and m) respectively of the unpaired electron of chlorine atom is

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2,1,0

2,1,1

3,1,1

3,2,1

Transition metals form complexes due to the participation of partially filled

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f-orbitals

d-orbitals

s-orbitals

p-orbitals

Which of the following species has unpaired electrons in ant-bonding molecular orbitals?

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O2⁺²

N2^-2

B₂

F₂

Two moles of HI was heated in a sealed tube at 440°C till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

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0.282

0.0796

0.0199

1.99

A nucleoside may be

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Ribonuleoside

Deoxyribonucleoside

Both a and b

None

When rate of forward reaction is equal to rate of backward reaction, then the equilibrium established is called

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Chemical equilibrium

Static equilibrium

Dynamic equilibrium

None of these

A pseudo uni-molecular reaction has order of reaction :

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3

2

1

0

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Which of the following has polar bond

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O₂

N₂

HCl

Cl₂

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

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Low value

Higher value

Both values

None of these

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

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