Question # 1

The component of solution in larger amount is .

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Solute

Solvent

A & B

nIL

There are ____________ states of matter

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4

3

2

1

Protons carry _________ charge.

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+

_

No

Neutral

The no. of periods in modern periodic table are

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7

11

18

23

For ________________ "like dissolves like".

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Metals

Bonds

Solubility

Nil

Gain of electrons in a reaction is called ____________reaction.

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Oxidation

Reduction

Both

Nil

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

Which one metal is least reactive?

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K

Fe

Cu

AI

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

An ion is a charged particles:

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True

False

In some conditions

Never

A strange bitter smell noticed near photo copier machine is of.

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H₂S

SO₂

O₂

O₃

The formula which represents the actual number of atoms in one molecule of organic compound is called.

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Molecular formula

Structural formula

Condensed formula

Dot and cross formula

Coal is the mixture of

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Hydrogen

Methane

Carbon monoxide

All

At the height 880120 km from earth's surface is.

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Troposphere

Mesosphere

Stratosphere

Thermosphere

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

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Formula of soda ash is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

Bister copper is pure about;

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70%

80%

90%

98%

Alkyl radical is derivative of

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Alkane

Alkene

Alkyne

All

At equilibrium state, when reaction cases to proceed, it is called:

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equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

On hydrolysis sucrose produces one unit of glucose and one unit of.

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Fructose

Starch

Cellulose

None of them

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

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30

32

34

40

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

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

The atomis radius is of the order of

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10^-8cm

10⁸cm

10^-12cm

10^-10cm

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

How many moles of water results by burning 4 mole of H2 with excess of oxygen.

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1 mol

2 mol

3 mol

4 mol

The nature of positive rays depends on

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The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

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It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

Tin has isotopes.

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9

10

11

12

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

The smallest collection of ions in an ionic compound is called.

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Formula unit

Chemical formula

Formula mass

Molecular formula

What happens to the enthalpy change when the coeffficients of a chemical equation are douubled

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It doubles

It becomes half

It does not change

It cannot be predicted

The word paper is derived from the name of which reedy plant

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Rose

Sun flower

Papyrus

Water

Which one of the following group of Periodic table called chalcogen family.

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Group III A

Group VA

Group VI A

Group VII A

The flavour of amylacetate is

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Orange

Apricot

Banana

Pineapple

An aldehyde is reduced to alkane with hydrazine is the presence of

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KOH

NaOH

CaO and NaOH

Ca(OH)2

The most ionic is

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HF

HCl

HBr

HI

Which one of the following macromolecules contains carbon, hydrogen, nitrogen and oxygen in it.

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Nylon-6,6

Terylene

Starch

Bakelite

The substance that retard the activity of enzyme is called.

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Co enzyme

Epo enzyme

Activity

Substrate

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

Hydrogen bond is the strongest between the molecules of

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HF

HCl

HBr

HI

Which of the following hydrogen halide is the weakest acid in solution

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HF

HBr

HI

HCl

the percentage of nitrogen in NH3 is

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46%

60%

82%

100%