Question # 1

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

D-block elements are also called

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Non-typical transition element

Outer transition elements

Abnormal transition elements

Inner transition

In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is

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1/3

1/5

2/3

5/6

Carboxylic acid having two carboxyl group are:

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Mono-carboxylic acid

Di-carboxylic acid

Tri-carboxylic acid

Tetra carboxylic acid

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

The value of oxidation number of chlorine in HCIOs is

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+7

+5

-1

+3

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure,temperature,and volume of the gas.

The total number of 3d-series transition elements is

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10

40

14

58

Which of the following is not a secondary pollutant

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Ozone

Carbonic acid

Sulphuric acid

Carbon dioxide

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

At present the number of cement factories is Pakistan are

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20

22

25

30

If heat absorbed in the reaction, the process is said to be

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Exothermic

Isothermal

Adiabatic

Endothermic

How is the secondary structure of protein stabilized

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Through hydrogen bonding

Through ionic bonding

Through van der wall forces

Through covalent bonding

Which of the following reagents is used to distinguish acetone and acetophenone

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NaHSO₃

Grinard reagent

Na₂SO₄

NH₄Cl

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Proton donar

Dehydrating agent

Catalyst

Electrophile

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

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Electrolytic cell

Nelson's cell

Galvanic cell

Down's cell

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

During the formation of a chemical bond the potential energy of the system

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Decreases

Increases

Does not change

None of these

The number of atoms or molecules whose concentrations determine the rate of the reaction is called

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Molecularity

Order

Rate of reaction

Rate constant

An element in +3 oxidation state has the electronic configuration (Ar) 3d³. Its atomic number is

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24

23

22

21

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

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0.25 mole

0.5 mole

1.0 mole

2.00 mole

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