Question # 1

Which one metal is least reactive?

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K

Fe

Cu

AI

The bond between two atoms will be ionic if the difference between their electronegativities is:

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Less than 1.7

Greater than 1.7

Zero

Less than 1.2

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

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

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Brass

Fog

Cheese

Air

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

Nil

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

The atomic number of potassium is:

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11

15

18

19

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

The earth is made up of ____________ % of aluminum.

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6

7

8

9

Which one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

Acid means

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Sour

Bitter

Sweet

Salty

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

Which one of the following compounds is an aldehyde?

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CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

Water of crystallization is responsible for.

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Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

Alkanes are produced in large amounts by cracking of

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Natural gas

Petroleum

Benzene

Xylol

Density of water at 4°C is:

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0.976 gem-3

1 gem-3

0.956 gem-3

1.1 gem-3

If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one.

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It will be saturated hydrocarbon

It will hav 8 hydrogen atoms

Its name will be n-butane.

It will be least reactive.

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

Word "acid" derived from:

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Urdu

English

Latin

Greek

Total pressure of mixture of two gases is.

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The sum of their partial pressures.

The difference of their partial pressures

The product of their practical pressures

The ratio of their partial pressures

The wave number of the light emitted by a certain source is 2 x 10⁶ m-1 . The wavelength of this light will be.

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500 nm

5000 nm

200 nm

5 x10⁷ m

Unit of rate constant is the same as that of the rate of reaction in

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2nd order reaction

3rd order reaction

Zero order reaction

1st order reaction

The drying agent used in a desiccator.

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Agcl

NH4Cl

P2O5

AlCl3

What is bond order.

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Number of unpaired electrons

Number of paired electrons

Number of electrons present in antibonding molecular orbital

Number of bond formed between two atoms after overlap

In given equation underlined element is. P+HNO3------------- H2PO4+NO+H2O

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Oxidized

Reduced

Neither oxidized nor reduced

Botha a and b

NaCI and sand can be separated by one of the following without filtration

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Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded byH2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

Which mixture of gases is used by the deep sea divers.

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Oxygen and nitrogen

Oxygen and helium

Oxygen and carbon di oxide

Oxygen and water vapours

How many electrons can be accommodated in sub shell for which n = 3, l = 1

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6

8

18

32

Calcium has isotopes

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7

9

1

6

Which of the following element is not present in all proteins

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Carbon

hydrogen

Nitrogen

Sulphur

The chief of aluminum is

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Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

Which one is an incomplete period

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4th

5th

6th

7th

Ethers show the phenomenon of

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Position Isomerism

Functional group isomerism

Metamerism

Chain isomerism

Which one of the followings is not observed in the combustion of pure methane in a plentiful supply of air

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Water in produced

CO2 is produced

The flame is smoky

Energy is released

Which one of the following is an amide

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(NH₂)₂CO

NH₂.CH₃

C₆H₅NH₂

N(CH₃)₃

Which halogen will react spontaneously with Au to produce Au3+

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Br2

F2

I2

Cl2

Which products is not formed when ethyl alcohol reacts with SOCl2 in the presence of pyridine.

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Ethyl chloride

Hydrogen chloride

Sulphur di oxide

Sulphur tri oxide

Chlomyl chloride test is used for the confirmation of

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Cl-

CO3^-2

NO3-

Cu2+

An ester can be prepared by the reaction of.

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Two alcohols

Alcohol and an aldehyde

An alcohol and an organic acid

an acid and a ketone

PCl3 reacts with water to form

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PH3

POCl3

H3PO4

H3PO5