Question # 1

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Yellow colour of the flame is observed with

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Calcium salt

Barium salt

Sodium salt

Potassium salt

Formula of orthophosphoric acid.

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H2PO4

H3PO3

H3PO2

H4P2O5

The point at which the reaction is observed to be complete is called.

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The equivalence point

The end point

The triplet point

The equilibrium point

Which of the following cast iron is heat treated for ductility.

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Gray iron

Malleable iron

White iron

None of these

Beside the common silica based SPE particles, polymer supports are also available They have advantages over silica based SPE particles, Which of the following reason is possible.

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These are stable over a wide pH range.

These do not possesses residual silica groups

These are designed to be wettable and have high capacity than silica base particles.

All above

What letter suffix steel identification means that it is steel with boron as an alloying elements.

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xxL xx

xxBxx

xxHxx

xxKxx

The number of phases of mixtures of four gases enclosed in a container is

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1

4

4-1

zero

The suffix "ate" at the end of the name of the compiled signifies that it is.

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Cation

Anion

Neutral

None of above

Which of the following substance acts as gaseous pollutant.

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NO

NO2

CO

SO2

All above

In which polymerization branching of chain cannot be possible.

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Free radical

Cationic

Anionic

Anionic and Zieglar Natta

The isoelectric point of a protein or amino acid to.

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pH at which it does not have any charge

pH at which it does not have not charge and does not migrate in electric field

pH at which the concentration of cation is greater than amino

pH at which the concentration of anion is greater than cation

What is the purpose of molybdenum in steel alloying.

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To increase dynamic and high temperature strength and hardness

To increase brittleness

To increase corrosion and resistance

All above

Which of the following analytical techniques can be used to extract metal ion chelates.

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Solvent extractions

Evaporation

GC

Distillation

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

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

The element having electronic configuration 1s2, 2s2, 3s2, 3p3 is.

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Trivalent only

Tetravalent only

Trivalent and pentavalent

Pentavalent only

Presence of nitrogen in organic compound to tested as.

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Nitrogen gas

NH3

NO

Amide

Which of the following has highest ionization energy.

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Oxygen

Argon

Barium

Caealum

The number of vibrational degree of freedom for CO2 is

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2

3

4

5

Which of the following configuration is associated with biggest jump between second and third IE.

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1s2, 2s2, 2p2

1s2, 2s2, 2p6, 3s1

1s2,2s2,2p6, 3s2

1s2, 2s2,2p6

How many varieties of commercial iron are known.

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1

2

4

3

Photochemical smog consist of excessive amount of X in addition to aldehydes ketones, PAN etc. X is.

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Methane

Carbon monoxide

Ozone

Carbondioxide

Which of the following species has highest bond energy.

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H2

T2

D

Cl

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.

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NH3 is not a planar molecule while BF3 is a planar molecule.

NH3 is a planar molecule, while BF3 is a planner molecule.

Fluorine is more electronetative than nitrogen

Born is more electronegative than nitrogen

The terpenoid responsible fo the smell

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Camphor

Genenial

Citral

Carvone

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

Are used as water repellents

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Carbides

Silicon

Silicones

Silicates

Which property is used in volumetric methods of analysis.

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Density

Viscosity

Volume

Molar volume

Which of the following pollutants does not a leave a residue.

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Air pollutant

Chemical pollutant

Soil pollutant

Noise pollutant

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