Question # 1

With increases of 10 oC temperature the rate of reaction doubles. This increase in rate of reactions is due to.

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Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increase in activation energy of reactants

Increase in number of effective collisions

A material or a collection of materials which is under study is called

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State function

Degree and joule

Degree and ergs

Calorie and joule

If a strip of Cu metal is placed in a solution of FeSO₄

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes place

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

The octet rule in not followed in the formation of

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NF₃

CF₄

CCI₄

PCI₅

A molecule has two ions pairs and two bond pairs around the central atom. The shape of molecule is.

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Linear

Pyramidal

Angular

Tetrahedral

In order to mention the oiling point of water at 110 ^oC, the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

Oxidation number of Cr in a C₂CrO₄ is

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+2

+4

+6

+8

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

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 number of Na, ions which surround each CI^1-ion the NaCI crystal lattice is

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8

12

6

4

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

The boiling point of water at Murree Hills.

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90^oC

98^oC

100^oC

120^oC

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