Question # 1

Which of the following species have undistributed octahedral structure.

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SF6

PF6

Si F₆^2-

XeF6

Which of the following is not a component of a gas chromatography system.

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Carrier gas

Capillary column

Packed column

Cathode lamp

Amorphous boron on burning in air form

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B(OH)3

Only B2O3

Only BN

Mixture of B2O3 and BN

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Glass industry requires soda ash with

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Solids density 1.91 and bulk density 1.0

Solids density 1.86 and bulk density 0.6

Solid density 1.80 and bulk density 0.58

All of above

Which of the following statement is not true with respect to photo chemical reactions.

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These take place in the presence of light

Free energy of these reactions may be positive or negative

Light intensity affect these reactions

Temperature has significant affect n rate of these reactions

During the last two centuries, the atmospheric CO2 contents are increased by

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15%

25%

35%

50%

Alkaline hydrolysis of chloroform produces.

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HCCO

HCOO - + CO

H3COH

CHCL2 OH

Who coined the word nanotechnology.

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Eric Drexler

Richard Feynamann

Sumio tijma

Richard smalley

Which is the following is not a buffer.

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H2CO3/HCO3

NH4Cl/NH4OH

CH3COOH/CH3COONa

NH3OH/CH3COOH

Which of the following play significant role in depletion of ozone layer.

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Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of above

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

Which of the following is not an extensive property.

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Work

Entropy

Free energy

Volume

Which of the following compound will be optically active.

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Suceinic acid

Meso tartaric acid

Acetic acid

Lactic acid

Pick out the incorrect statement for Xe F6

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XeF6 is hydrolyzed practically to form XeOF4

It reacts with SiO2 to form Xe F4

On complete hydrolysis, it forms XeO3

It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.

Which of the following is not a characteristics of terpenoids.

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They are pleasant smelling liquids

They are steam volatile

They are nitrogenous bases

they are insoluble in water

Which of the following technique is used for separation of volatile components.

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GC

HPLC

FPLC

TLC

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

Which of the following is not an organic precipitating agent.

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Diemethglyoxime

Cuperon

Oxime

Acetate

Which metal burns in air at high temperature with the evolution of much heat.

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Cu

Hg

Pb

Al

The atomic and ionic radii value on moving from left to right in the sereis.

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Increase

Decrease

Does not change

None of above

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

Which of the following compounds does not show dipole moment.

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CH3OH

HBr

CCl4

CHCl3

Which substance has the greatest lattice energy.

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CuBr

MgO

KI

NaF

Commercial incinerators produce.

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Smoke

CO

NOx

All above

Earth is protected from U.V. radiations by

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Carbon dioxide layer

Oxygen layer

Ozone layer

Troposphere

The aluminium salt commonly used to stop bleeding is

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Aluminium sulphate

Potash Alum

Aluminium chloride

Aluminium fluroide

Molecular weight of proteins may be determined by

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Osmotic pressure measurements

Sedimentation methods

Light scattering methods

All of these

A diameter of human hair is approximately ________________ m

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75000

75

7.5 x 10^-5

7.5 x 10^-9

Which of the following hydroxide is getatinous in nature.

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Fe(OH)3

Al(OH)3

Ca(OH)3

Cr (OH)3

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