Question # 1

Which of the following statement is not true is case of catalytic reforming.

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Dehydrogenations high endothermic

Dehydrogenation is exothermic

Hydrodealkylation reactions are endothermic

None of these

Who coined the word nanotechnology.

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Eric Drexler

Richard Feynamann

Sumio tijma

Richard smalley

Stainless steel contains

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Fe+Cr+Ni

Fe+Ni+Cu

Fe + Cr+ Cu

Cu + C + Ni

The specific gravity of H2SO4 is

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1.37

1.84

1.17

1.57

Visible light is just a portion of radiation emitted by atoms.Which of the following statements is not related with visible light.

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visible light is electromagnetic in nature.

It travels with the speed of light

It is a mass

The wave number of light is directly proportional to its wave length.

The alkali metal that react with nitrogen directly to form nitrides.

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Na

K

Rb

Li

The ration of thermal conductivity of silver to that of a carbon nanotube is.

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100 : 1

1 :100

10:1

1:10

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

Which of these historical works of art contain nanotechnology.

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Lycurgus cup

Medieval stained glass windows in churches

Damascus steel swords

All of the above

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

Borax exist in the form

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Ordinary borax

Octahdral borax

Borax glass

All above

Which of the following iso -electronic ion would require least energy for the removal of electron.

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Ca2+

Cl-

Ar-

K+

The process in which ore is heated generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points is called.

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calcination

Roasting

Froth floatation

Bessemerization

The element with the highest first ionization potential is.

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Boron

Carbon

Nitrogen

Oxygen

The base which in not present in DNA is

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Adenine

Guanine

Thymine

Cytosine

Which one of the following ionsis colourless.

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Cu+

Ni2+

Co2+

Fe3+

The equivalent conductance (^) and molar conductance ( ^ m ) of BaSO4 are related as.

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^ = ^m/2

^/2 = ^m

^ = ^m

^ = ^m/4

1 meter = ___________ nm

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10⁹

10^-9

10¹⁰

10^-10

The maximum number of electrons in first energy levels are.

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1

2

8

10

Which of the following is not an intensive property.

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Melting point

Refractive index

Entropy

Density

Which of the following can be used as drying agent of ammonia.

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CaO

Anhydrous CaCl2

P2O5

Conc. H2SO4

In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.

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Group 1

Group 18

Group 4

Group 14

Aluminium hydroxide is.

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An acid

An amphoteric hydroxide

A base

An explosive hydroexide

How many unpaired electron are there in a strong field iron (II) octahederal compled.

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0

1

2

4

Excluding H-atom , Hydrogen bond never involves more than atoms.

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One

Two

Three

Four

'A line, a point or a plane about which a symmetry operation is performed, is known as.

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Symmetry operation

Symmetry element

Reflection

Inversion

The reduction of an alkyne to alkene using Lindlar's catalyst results into

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Syn addition of hydrogen atoms

Anti addition of hydrogen atoms

A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other

A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.

The correct increasing order of bond dissociation energy for N2, O2, F2 and Cl2 is

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N2 < O2 < F2 < Cl2

F2 < Cl2 < O2 < N2

F2 < Cl2 < N2 < O2

N2 < Cl2 < F2 < O2

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Silicon bronze contains how many percent of silicon.

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96%

3%

1 %

69 %

UV radiation from the sun causes a reaction in the atmosphere that leads to production

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

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