Question # 1

The relative populations of gourd state and excited state populations at a given flame temperature can be estimated using.

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Boltzmann distribution law

Maxwell law

Lambertie law

Beer's law

In a system of designating wrought aluminum alloys. what does the second digit represents.

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The purity of aluminum

The identity of the alloy

The modification of the alloy group or impurity limits

None of above

Which of the following methods is used in qualitativ eanalysis.

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Physical method

Chemical method

Instrumental method

All above

_______ is heat treatment cycle that prevents glass from harmful stress.

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Forming

Annealing

Batching

None of these

Which of the following statement is not correct regarding dissociation constant (Ka)?

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It is a measure of the tendency of an acid to split up into ions

The greater the value of Ka, more is the dissociation

It is determined by conductimetric method

It is not a proper parameter for weak acids

What ASTM test for compression is designated for plastics.

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D 638

D 695

D 790

D 732

Keeping in view the periodic law and periodic table, suggest which of the following elements should have maximum electronegative character.

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Oxygen

Nitrogen

Fluorine

Astatine

The maximum absorption in [Ti(OH)2)6 3+ take place at wavelength of.

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4000 A^o

5000 A^o

6000 A^o

10000 A^o

The compound contains two types of X and Y its crystal structure is a cubic lattice with X-atoms at the corners of the unit cells and Y-atom t the body centre, The simplest formulae of this compound is.

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X2Y

XY

XY2

X8Y

Metal are

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Hard

Ductile

Malleable

All

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

Select the correct IUPAC nae for [Co(NH3)6 ]2+

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Hexammoniacobaltate (II) ion

Hexaamminecobaltate (II) ion

Hexammoniacobalt (II) ion

Hexaamminecobalt (II) ion

Which of the following process is not physical in nature.

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Mixing

Flocculation

Sedimentation

Activated sludge process

Which of the following group reagent is used for III group of basic radical.

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Dilute HCl

H2S + HCl

NH4OH + NH4Cl

NH4OH + H2S

Each of the following compound react with Grignard's reagent to form alkane exxcept.

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Ethanal

Ethanoic acid

Ethanol

Ethync

Which of the following phenomena is not explained by the classical mechanics.

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Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

The expression of specific conductance is given by

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Ls= I/R , l/A

Ls = L I/A

Ls = I/L , A/l

LS = r l/A

All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.

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Carnot cycle

Carnot theorem

Narnst theorem

Second law of thermodynamics

Which of the following elements has the highest third ionization energy.

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Sodium

Magnesium

Aluminum

Silicon

Which of the following is the most suitable catalyst for ammonia synthesis.

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Pt

ZnO+ Cr2O3

Fe in fused mixture of Al2O3 + SiO2+ MgO

All of above

Which of the following item is not symmetry element.

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Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

Washing soap can be prepared by saponification with alkali of _____ of the following oil.

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Rose oil

Paraffin oil

Groundnut oil

Coconut oil

Who prepared and explained nano tubes for the first time.

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Sumio Tijima

Richard Smaley

Erick Drexler

Richard Feynamann

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

Which of the following statement is not related with direct use of solar energy.

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It is used for space heating of buildings

It can be used to produce electrical power using photovoltaic cells

It can be used to produce hydrogen gas

It can be used start motor vehicle

Given A + 3B ____________ 2C + D

This reaction is first under with respect to reactant A and second order with respect to reactant B . If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by factor of _____________

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Increase ,2

Decrease ,2

Increase ,4

Decrease ,4

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

In the forth floatation process for the purification of ores, the ore particles float because.

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They are light

Their surface is not easily vetted by water

They bear electrostatic charge

They are insoluble

The pink colour of phenolphthalen in in basic medium is due to the

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Cationic form

Anionic form

Natural form

OH- ions of the base

The unit of specific conductance will be

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S cm-1

Ohm cm

Ohm cm-1

Mho cm

In which of the following compound valency of carbon in 4 but its oxidation number is zero

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Methane

Carbon dioxide

Carbon monoxide

Formaldeyde

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