Question # 1

The three isotopes of hydrogen differ from one another in

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Atomic number

Number of protons

Nuclear charge

Nuclear mass

The group H steels can be used n what temperature range.

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600^oC to 1100 ^oC

1000 ^oC to 1500 ^oC

1100 ^oC to 2000 ^oC

200 ^oC to 800 ^oC

Which one has a co ordinate bond.

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Al2Cl6

BF3

NaCl

O2

Helium contents in the atmosphere by volume.

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0.0005%

0.0015%

0.0001%

0.00001%

Which of of the following statement is not correct in respect of

Arrhenius concept.

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This concept is applicable only for aqueous systems.

Neutralization takes place in aqueous medium only

H+ ion concept remain as such in water

This concept is applicable for non aqueous system only.

The first ionization energy of Mg is lower than

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Na

Ca

Al

Be

Which of the following is atmospheric pollutant.

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CO2

CO

O2

N2

Fertilizers are classified into

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Two major categories

Three major categories

Four major categories

None of above

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

The branch of physics that mathematically describes the wave properties of electron in atomic is called.

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Statistical Mechanics

Quantum Mechanics

Chemical statistics

Thermodynamics

In a system of designating wrought aluminum alloys a sour digit number is used what does the first digit indicate.

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The purity of aluminum

The identity of the alloy

The alloy group

All of above

Which of the following technique is used to separate substance based on their charge to mass ratio.

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HPLC

HPTLC

GC

Electrophoresis

The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be.

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-349 kJ mol -1

349 kJ mol-1

-698 kJ mol-1

698 kJ mol-1

Finely divided iron combines with CO to give.

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Fe(CO)5

Fe2(CO)9

Fe(CO)12

Fe(CO)6

Which of the following energy is trapped by the autotrophic organisms.

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Mechanical energy

Electrical energy

Radiant energy

Electronic energy

Has the highest value of electronegativity

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F

Cl

Br

I

Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere.

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Polyhalogens

Ferrocene

Freons

Fullerencs

Example of linear geometry

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XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Which substances is not used as an additive in paper industry.

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Glucose

Starch

Alum

None of these

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

Which of the following statement is no true with respect to nitrogen dioxide.

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It is produced by the oxidation of NO

Its small concentration has been detected to lower stratosphere

It is major pollutant

It does not absorb sunlight.

Which of the following substance is generally not considered an air polutant.

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CO

CO2

SO2

NO2

Which of the following analytical technique is based on the refraction of radiation.

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Conductometry

Refractometry

Coulometry

Potentiaometry

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

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KCl

NH4Cl

KNO3

CaCl2

In extraction of iron, the furnace charge consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidation agent

A reducing agent

Flux

Slag

Nano technology in other words is.

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Carbon engineering

Atomic engineering

Small technology

Microphysics

The multiplicity of the electronic state is equal to.

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S + 1

2S + 1

2S - 2

2S + 2

In nature nickel is found in the form of.

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Sulphides

Silicates

Arsenides

All

What type of steel has 0.8 % carbon and 100% pearlite.

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Austenite

Eutectoid

Hyper eutectoid

Silver steel

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

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