Question # 1

The H2SO4 obtained by the contact process having purity

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70%

74%

78%

82%

Which one of the following noble gas is obtained by radioactive disintegrastion

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Kr

Br

Rn

Xe

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

The proper number of significant figures in the number 0.0780 is.

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3

1

4

2

Which of the following elements with excess oxygen to form proxides.

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Ca

Mg

Li

Ba

in the system of designating wrought aluminum alloys the letter F that follows the number indicates what condition of the alloy.

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As fabricated

Calcined

Annealed

Strain hardened

A diameter of human hair is approximately ________________ m

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75000

75

7.5 x 10^-5

7.5 x 10^-9

What is a process for making glass reinforced shapes that can be general by polling resin impregnated glass stands though a die.

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Continuous pultrusion

Bulk molding

Vacuum bag forming

Computational analysis

Which of the following elements has the highest melting point.

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Magnesium

Calcium

Strontium

Berylliium

Which of the following is not an alkali metal

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Rb

Sb

Cs

Fr

Identify the incorrect statement regarding crystallization from the following.

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It is an important procedure for purifying solids

The impurities are removed by filtering the solution

Crystals are separated by filtration

In crystallization method, the solid is dissolved in a solvvent in which it is soluble at all temperature.

Which of the following is capable of forming zwitter ion.

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Amino acids

Halo acids

Hydroxy acids

All of these

Yellow green flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

Which of the following groups exert -1 effect.

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- NO2

- CN

-COOH

<C = 0

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

Which of the following should have the largest dipole moment.

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Carbon tetrachloride

Cis-stibeue

Trans-atibeue

Cis-dichlorocthylene

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

Equal volumes of all gases, under similar conditions of temperature and pressure, contain equal number of molecules. This is a statement of.

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Graham's law

Dalton's law

Avogadro' law

Boyle's law

Which of the following technique involves the bonding of hydrophobic functional group to solid particle, surface and acts as extracting phase

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Liquid phase extraction

Solid phase extraction

Electrophoresis

Gel electrophoresis

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

Green houses are responsible for keeping our plant warm and sustaining life on the earth.

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CO2 & water vapours

CO2 & CFC

CO2 & H2O

CO2 & CH4

The half life for a first order reactions 32 s, What was the original concertation if after 2.0 minutes, the reactant concentration is 0.062 M.

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0.84 M

0.069 M

0.091 M

0.075 M

Vet days are generally applied to the fabric in the form of.

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Mordants

Leuco base

Oxidised base

Dispersed dyes.

The value of comprehensibility factor (z) = pV/nRTfor an ideal gas is equal to.

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R

1

2

3

Which of the following is most soluble in water

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CaSO4

Sr SO4

MgSO4

BaSO4

The Langmuir theory of unimolecular adsorption is generally valid at.

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Low pressures and low temperature

Low pressures and high temperature

High pressures and low temperature

High pressure and high temperature

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

Which of the following techniques does not belong to column chromatographyy

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TLC

HPLC

Electrophoresis

Ion exchange

Each fat or oil in made up of

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A distinctive mixture of several different triglycorides

A distinctive mixture of several aldehydes

Mixture of above both

None of above

Which one of the following oxides is basic.

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MnO

Mn2O3

MnO2

Mn2O7

An acid base titration involves a neutralization reaction in which an acid is reacted with an equivalent amount of base The titrant is always a strong acid or base The analyte may be

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Strong acid

Strong base

Weak acid and Weak base

All above

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