Question # 1

The number of spherical nodes in 3p orbitals are

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One

Three

Non

Two

Covalent compound s mostly exist in the form of:

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Protons

Atoms

Neutrons

Molecules

Formula of chloroform is:

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

For a 3P subshell the set of principle and azimuthal quantum number is

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n = 1 , l = 2

n = 3, l = 0

n = 3, l = 1

n = 1, l = 3

Which statement about Arrhenius equation is incorrect

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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants

Rate of reaction increase by increasing temperature

Rate constant k is increased

Activation energy Ea is decreased by rise in temperature

The unit of rate of reaction is

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mole dm^-3

mole Kg^-1

moles dm^-3sec^-1

grams dm^-3

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Pressure change

Temperature change

Concentration change

Catalyst

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Phenol is also known as

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Acetic acid

Carbolic acid

Tararic acid

Trichloroacetic acid

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

In a period, melting points of elements

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Increases

Decreases

Remain constant

First increases then decreases

Oxidation of ter-alcohol gives:

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Aldehyde

Formaldehyde

Ketone

Alkens

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

The electronic configuration of an atom/ion can be defined by the following

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Aufbau principle

Pauli's exclusion principle

Hund's Rule

All the above

When primary amine reacts with chloroform in ethanolic KOH, then the product is

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An isocyanide

An aldehyde

A cyanide

An alcohol

Shahi Qilla may be destroyed by

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Flood in Ravi

Temperature mediated spoilage of marble

Air pollutants from Lahore chemical industries

All the above

Li, Be, B, C, O, Fl Ne are elements of

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Second period

First period

Third period

Fourth period

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

In KO₂the oxidation state of oxygen is

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-2

-1

+1/2

-1/2

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

Which of the following element has the maximum electron affinity?

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F

S

I

Cl

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

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0°

60°

120°

180°

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

The acid present in vinegar is

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CH₃COOH

HCI

H₂SO₄

HCOOH

Which of the following compounds does not react with NaHSO₃?

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C₆H₅CHO

Acetophenone

Acetone

Acetaldehyde

Most transition elements show

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Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Elevation of boiling point is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

None of these above

The total values of magnetic quantum number of subshell are five, the subshell is

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S-subshell

P-subshell

D-subshell

F-subshell

Ultraviolet radiation from sun causes a reaction that produces

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

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