Question # 1

The example of solution of a solid solute in a solid solvent is

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Brass

Fog

Cheese

Air

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

The no.of elements in the first period is

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2

8

18

23

Potassium's atomic no. is :

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17

18

19

20

Atoms are made of sub _________

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Atoms

Molecules

Charge

Atomic particles

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

|Which one is not an Arrhenius acid?

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HCl

H2SO₄

CO₂

HNO₃

Bases gave taste:

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Bitter

Sweetsh

Sour

Saltish

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

At the time of partition, How many industries wee present in Pakistan.

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30

32

34

40

Composition of carbon in the diesel oil.

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C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

Which gas acts as a glass wall of a green house?

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Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

Which one of the following species is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Petroleum is refined by:

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destructive distillation

fractional distillation

simple distillation

dry distillation

Which one of the following is a synthetic fibre?

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Cotton

Wool

nylon

silk

Which of the following salt is soluble in water.

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NaCl

KCl

Na₂SO₄

All of them

In zero order reaction, the rate is independent of.

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Temperature of reaction

Concentration of reactants

concentration of products

None of these

Rutherford's model of atom failed because.

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The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for stability of the atom

There is actually no space between the nucleus and the electrons.

In NICAD dry cell, the cathode and anode is made up of.

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Ca and Ag

Ni and CdO2

NiO2 and Cd

Ag and Ag2O

In zero order reaction the rate is independent of.

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

The quantitative relationship between rate and concentration is given by.

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Law of mass action

Rate law

Both of these

Le Chatelier's principle

Splitting of spectral lines when atoms are subjected to strong electric field is called

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

The reaction that involves gases, its rate does not depend upon

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Catalyst

Temperature

Moles dm^-3

Partial pressure

Repeated extraction using small portions of solvent are more.

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Accurate

efficient

Slow

Rapid

Solvent extraction method is particularly useful technique for separation when the product to be separated is

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Non-volatile or thermally unstable

Volatile or thermally unstable

Non-volatile or thermally stable

Volatile or unstable

Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non-ideal behaviour of gases

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At high pressure, the gas molecules move in one direction only

At high pressure, the collisions between the gas molecules are increased

At high pressure, the volume of the gas becomes insignificant

At high pressure, the intermolecular attraction becomes significant

Which one of the following gases exist in monoatomic form.

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Ozone

Nitrogen

Krypton

Phosphine

Which compound will have the maximum repulsion with water

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C₆H₆

C₂H₅OH

C₃H₇OH

CH₃OCH₃

Acetic acid form a dimer in liquid phase because.

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Low ionization constant of acid

High solubility in water

Hydrogen bonding

Greater polarity

Magnesium metal does not burn in the jar of

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N2

O2

Ne

N2 and O2

Which statement is correct about the given reaction.

2NaOH + Cl2 --------------- NaCl + NaCIO + H2O

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Cl is oxidized and O is reduced

Cl is reduced and O is oxidized

Cl is oxidized as well as reduced

Neither Cl nor oxygen is reduced or oxidized

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

The news paper can be recycled again and again as many times as

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5

3

4

2

------------- metal is used in the Thermite process because of its reactivity

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Tron

Copper

Aluminium

Zinc

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which element form maximum compounds with Xenon

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F

Cl

Br

I

Whcih water will be considered as polluted water.

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High value of COD

Low value of COD

High value of DO

Low value of BOD