Question # 1

Metal are

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Hard

Ductile

Malleable

All

Which cast iron is hard and wear resistant.

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Grey iron

White iron

Melleable iron

None of these

Which of the following has the bighest value.

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Transnational partition function

Rotational partition function

Vibrational partition function

Electronic partition function

Which type of elements form ionic hydrides.

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Transitionelements

Metalloids

Elements with high electronegativity

Elements with high electropositivity.

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

What is the activation energy of a reaction whose rate constant increases by a factor of 100 upon increasing the temperature from 300 K to 360 K.

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27

35

42

69

The size of nanoparticles is between __________ nm

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100 to 1000

1 to 100

0.1 to 10

0.01 to 1

For one mole a gas, the total kinetic energy is equal to.

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2/3 Rt

3/2 RT

2/3 kT

3/2 kT

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

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

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

The sample characteristics affecting the weight loss curve include.

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Amount of sample

Sample particle site

Heat of decomposition reactions

All

Which of the following makes the motion of perpetual motion machine a physical impossibility.

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First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The Boltzmann law

CO belong to which group.

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C_2v

D_2h

C_av

D_ah

A thionic acid

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H2S2O3

H2S2O6

H2S2O8

H2S2O7

During the titration of weak acid against NaOH the conductance of the solution after the neutralization point.

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Is constant

Decreases

Varies irregularly

Increase

Law of octaves was proposed by

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Lother meyer

D.I.Mendeleev

J.A.R. Newlands

J.W. Dobereiner

Which of the following statement is not correct n respect of Arrhenius concept.

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The concept is applicable only for aqueous systems.

Neutralization takes place in aqueous mediam only

TH+ ion cannot remain as such in water

This concept is applicable for non aqueous system only.

Major principle underlying the sustainability of natural ecosystems is that they run on.

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Electric energy

Solar energy

Wind energy

None of the above

PCRA stand for

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Pollution control research association

Petroleum conversation Research association

Petroleum control research association

All of above

Phosphorus normally exhibit a covalency of.

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+1 and +2

+2 and +3

+3 and +4

+4 and +5

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives.

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o - creaol

p - creaol

2,4 -dihydroxy toluene

Benzoic acid

Which of the following is not an intensive property.

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Melting point

Refractive index

Entropy

Density

The width of a typical DNA molecule is _______nm

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1

2

5

10

Deviation in a particular measurement is the difference between the measured value and the average value The arithmetic mean of the different deviations observed in several measurements of the same quantity is known as.

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The standard deviation

The average deviation

Relative mean deviation

variance

What is the approximate chromium range of a ferritic stainless steel.

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12% to 18%

16% to 20%

20% to 24%

12% to 16%

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

Glass obtained by placing a layer of butyral plastic with a suitable adhesive between two layers of glass and cementing them by heat and pressure is called.

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Glass wool

Safety glass

Optical glass

Jena glass

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

At extremely low pressures, the van der Waals equations for one mole may be written as.

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PV = RT + Pb

PV = RT

PV = RT - a/V

(P +a) (V-b) = RT

The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order.

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H2> N2> O2 > NH3

NH3 >O2 > N2 > H2

H2 > N2 > NH3 > O2

H2 >NH3 > N2 > O2

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