Question # 1

When the concentration of product is increased the instantaneous rate of reaction with reference to reactants will be

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Positive

Negative

the same

falling curve

4.4 g of CO₂ contains how many litres of CO₂ at STP?

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2.4 litre

2.24 litre

44 litre

22.4 litre

Oxygen and sulphur are present in VI-A group of the periodic table The hydride of oxygen i.e., H2O is liquid at room temperature but the hydride of sulphur (H2S) is a gas. This is due to

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greater bond angle of water than Hs

greater bond lengths in HS than H2O

hydrogen bonding in water

acidic character of HS

Charles s law is only satisfied if temperature is taken on

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Kelvin scale (b)

Celsius scale (°C)

Fahrenheit scale (°F)

All of these

which one pair has the same oxidation state of-Fe?

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FeSO4 and FeCl4

FeCl4and FeCl3

FeSO4 and FeCl2

Fe2(SO4)3 and FeSO4

Equal volumes of all gases at STP contain equal no of molecules is called

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Dalton's law of partial pressure

Graham'a law of diffusion

Avogadro's law

None

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be:

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Remain uncharged

Double

Reduced

Increased four times

Spectrometry method is applicable if a reactant or a product absorbs radiation

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Ultraviolet

Visible

Infrared

Any of these

Which of the following decides the reactivity of alkyl halides?

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C-C bond strength

C-H bond strength

C-X bond strength

Electronegativity difference

The number paper industries in Pakistan are:

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30

25

35

20

The graph between pressure and volume at constant temperature for gas is:

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Isobaric

Isothermal

Isotherm

None of above

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

When the 6d orbital is completed the entering electron goes into

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7f

7 s

7 p

7 d

Which compound will not dissolve in H₂O

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C₆H₆

C₂H₅OH

CH₃CH₂CH₂OH

CH₃- OH

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

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HCHO

CH₃CHO

CH₃COCH₃

CO₂

The rate of reaction :

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Decreases as the reaction proceeds

Increases as the reaction proceeds

May decrease or increase reaction proceeds

Remains same as the reaction proceeds

In the electronic configuration of Cr one electron from 4s sub-shell is transfered to 3d sub-shell because

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The 3rd orbital is of lower energy than 4s

The 4s orbital is of equal energy to 3d orbital

The half filled d-subshell is more stable than incomplete d-sub shell

6 unpaired electrons make Cr more paramagnetic

A bond between two atoms may be obtained by sharing of electrons such a bond is called

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An ionic bond

A coordinate bond

A dative bond

A covalent bond

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Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

The elements of sub-group A are called

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Transition elements

Main elements

Typical elements

Rare earth elements

During electrolysis of KNO₃, H₂is evolved

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Anode

Cathode

Both a and b

None

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