Question # 1

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

One atmospheric pressure is equal to how many pascals?

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101325

10325

106075

10523

............. are sonorous.

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Metals

Solids

Metals

Force

The no. of periods in modern periodic table are

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7

11

18

23

O3, Ozone is _________ molecules.

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Homoatomic

Hetroatomic

Monoatomic

Nil

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

K_c is always equal to

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Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

The formula of ozone is.

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O₂

O₃

O

CO

Which of one of the following is used as as fumigant:

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

____________ is synthetic fiber.

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Cotton

Woal

Nylon

Silk

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

Which gas is used to prepare ammonia?

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N₂

O₂

Cl₂

S

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

Which salt is used as a table salt?

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NaCl

Na₂CO₃

Na₂SiO₃

NaCl

Coal is blackish complex mixture of compounds of

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Carbon

Hydrogen

oxygen

All

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

Under which conditions of temperature and pressure will a real gas behave most like an ideal gas.

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Low temperature and how pressure

High temperature and high pressure

Low temperature and high pressure

High temperature and low pressure

In order to mention the B.P of water at 110 ^oC the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

In azeotropic mixture showing positive deviation from Raoult's law the volume of the mixture is

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Slightly more than the total volume of the components

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

If an endothermic reaction is allowed to take place very rapidly i the air, the temperature fo the surrounding air.

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Remains constant

Increase

Decrease

Remain unchanged

The gain of electron is known as.

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Oxidation

Reduction

Dehydration

Dehydrogenation

Which statement is incorrect about Dempster's mass spectrometer.

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Solid sample can be used in this mass spectrometer

Ions are detected on the basis of mass to charge ratio

Atoms or molecules are ionized with beam of electron.

This spectrometer work at one atmospheric pressure.

Acetone and chloroform are soluble in each other due to

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Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

Fluorine is in group VIIA of periodic table. Its chemistry will most closely resembles that of.

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Argon

Boron

Iodine

Sulphur

Rectified spirit contains alcohol about

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80%

85%

90%

95%

In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms

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Two

Three

One

Four

Which of the following compounds is used to make spray, which has fungicidal action.

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Which one the following a dihydric alcohol

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Ethanol

Cyclo hexanol

Glycerol

Glycol

Which of the following has highest M.P

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Aluminium

Silicon

Phosphorus

Sulphur

Group VI B of transition elements contains.

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Zn, Cd, Hg

Fe, Ru,Os

Cr, Mo, W

Mn, Te, Re

Formula of marsh gas is

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CH₄

C₂H₆

C₃H₆

C₄H₁₀

Thickness of atmosphere is about how much kilometer above the surface of warth

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100 km

1000 km

10,000 km

unlimited

How much fresh water is used for domestic purpose

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8%

23%

69%

100%