Question # 1

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

A colorless gas with pleasant odour and sweet taste.

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N2O

N2O3

NO

N2O4

The unit of specific conductance will be

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S cm-1

Ohm cm

Ohm cm-1

Mho cm

Aluminium is used for.

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Making ultensile & framea

Making alloys

Reducing agent

All above

Which of the following acid radical gives chromyl chorate test.

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F-

I-

Cl-

Br-

Which of the following radical is not a member of IV group.

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Mg²⁺

Co²⁺

Ni²⁺

Mn²⁺

Al2Cl6 is an example of

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Ionic bond

Covalent bond

Co ordinate bond

Metallic bond

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

What refer to the casehardening process by which the carbon content of the steel ear the surface of a part is increased?

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Carburizing

Annealing

Normalizing

None of these

Which of the following enthalpies is always negative.

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Enthalpy of melting

Enthalpy of combustion

Enthalpy of solution

Enthalpy of formation

Aviation Fuel contains.

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Light Naphtha

Medium Naphtha

Kerosene

Diesel

Cyclic polymers of ethylene glycol formed by condensation are called.

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Crown ether

Brown ether

Cryptates

Both A and C

d2 sp3 is oriented in a manner

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Trigonal

Tetrahedral

Octahedral

Trigonal bipyramidal

Which of the following has cubic structure.

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Sodium chloride

Potassium Chloride

Diamond

All of above

The most abundant metal in earth's crust is.

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Fe

Al

Ti

Ca

Which of the following does not apply to nanotechnology.

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It is a general purpose technology

It can be called Green technology

Newtonian mechanics can describe it.

It involves rearrangement of atoms

The number of moles of solute dissolved in 1000 gram of the solvent is called

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Formality

Molality

Molarity

Mole fraction

In the presence of dilute alkali monosaccharides undergo reversible isomerisation . The reaction known as.

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Kiliani reaction

Weermann rearrrangement

Lobry do Bruyn Van Ekenstein rearrangement

Mutarotation

Ingold's isoprence rule states that in terpenoids isopren units are joined.

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Head to tail

Head to head

Tail to tail

In a random order

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

The separation efficiency of a column can be expressed in terms of number of.

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Solvents used

Theoretical plates

Stationary phases

Mobile phases

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

Coagulation of protein on treatment with heavy motal salts or heating is called.

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Decolorisation

Denaturation

^{Sedimentation process}

Reversible precipitation

Who prepared and explained nano tubes for the first time.

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Sumio Tijima

Richard Smaley

Erick Drexler

Richard Feynamann

The current voltage characteristics forms the basis of.

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Thermal analysis

Potentiometry

Polarography

Colorimetry

The percentage of nitrogen in Urea is _____________%

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46

37

82

50

Soapy detergents and soapless detergents behave differently in hard water because they

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Have different hydrophilic heads

Have different hydrophobic hydrocarbon chains

Have different pH values

Above A and C both

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

The alkaline hydrolysis of fat is know as

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Condensation

Esterification

Saponification

Emulsification

Colloids can be purified by

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Peptization

Coagulation

The Breeding are method

Dialysis

Radon is obtained only in the radioactive decay of

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Radium

Thorium

Actinium

Any of above

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