Question # 1

The phase rule was deduced by

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Gibbs

Thomson

Troution

Henry

Which of the following properties of a system does not change in a state of equilibrium.

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Density

Pressure

Colour

All above properties

Which of the following give higher fibre strength.

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Eucalyptus

Pine

Bagnasse

Sugar cane

Metal crystallize is system having co ordination number

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8

12

14

any one of above

Which of the following can act both as a Bronsted acid and a Bronsted base.

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Na2CO3

OH-

HCO3-

NH3

Which of the following is not an intensive property.

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Melting point

Refractive index

Entropy

Density

Which is the correct order of wave number of the following redistions.

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X-rays > uv > Infrared > visible> radio waves

X-rays > uv > visible > Infrared > radio waves

X-rays > radio waves > uv > visible > Infrared

X-rays > Infrared > uv> visible > radio waves

Human hearing is sensitive to frequency in the range of about

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10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

Which of the following trihalides of nitrogen behaves as the weakest base.

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NF3

NCl3

NBr3

NI3

Permanent hardness of water is due to.

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Sulphate of Ca

Chloride of Ca

Sulphate of Mg

All above

Reaction in which molecules absorbing light do not themselves react but induce other molecules to react are called.

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Chain reactions

Photosenaitized reactions

Reversible reactions

Free radical reactions

Which of the following physical properties is employed int he analytical methods.

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Electric current

Transition temperature

Surface tension

All above

Which of the following is branch chain polymer.

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Glycogen

Terylene

PVC

Orlen

H2SO4 is used

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In the preparation of aqua regia

In the purification of gold and silver

In the dental filling

None of above

The number of bonds formed by the central atom is called its.

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Valence number

Complex number

Coordination number

Avogadro's number

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

The specific gravity of H2SO4 is

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1.37

1.84

1.17

1.57

If for a solution of an electrolyte. It is the transport number of the cation, then the transport number of the anion I, is equal to

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t/2

1 - t+

1 + t+

(i -t) /2

Which of the following methods is the most common method for separation of liquid components from a mixture.

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Dialysis

Solvent extraction

Precipitation

Distillation

The term 'brass' is very commonly used to designate any alloy primarily of.

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Copper and zinc

Aluminum and iron

Copper and aluminum

Zinc and nickel

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

The following are primary alloying ingredients of Group H steel except.

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Malybdenum

Cobalt

Chromium

Tungsten

CO belong to which group.

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C_2v

D_2h

C_av

D_ah

All the halogen form oxyacide, except

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Florine

Chlorine

Bromine

Iodine

Lead pencil contain

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Lead

Lead sulphide

a mixture of lead and silica

graphite

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

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GC

HPLC

FPLC

TLC

What is the ratio of the maximum load in a tension test to the original cross sectional area of the test bar.

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Tensile strength

Yield strength

Shear strength

Torsion

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Which of the following is used to make non-stick material.

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Vinyl cyanide

Tetrafluoroethene

Vinyl chloride

Styrene

The splitting of H2O can be carried out through

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Photolysis

Electrolysis

Dialysis

Hydrogenation

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