Question # 1

The penultimate shells have pscudo inert gas type configuration.

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Ga

In

TI

All above

Trimethylamine is a weaker base than dimethylamine is explained by

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Steric effct

Resonance effect

Inductive effect

All above

Which of the following is soluble in water.

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AgF

AgCl

AgBr

Ag I

Which of the following compounds is electrovalent in nature.

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SO2

ICI

KBr

CHI3

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

_________ is used as stablizer.

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CaO

SiO2

NaCl

None of these

When fullerencs were discovered they were thought to be

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First example of spherical aromatic molecule

First example of spherical non aromatic molecule

First example of diamond lime molecule

None of the above

In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.

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Group 1

Group 18

Group 4

Group 14

The fraction of the total current carried to an ion is called itss.

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Ionic mobility

Transport number

Limiting ionic conductance

None of these

The rate constant for 3rd order reaction has the dimentions of.

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mol-2 s-1

I2 mol-2 s-1

mol I -1 s-1

I-1 mol -1 s-1

Which of the following orbitals does not make sense.

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6f

4f

7s

2d

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

The ration of thermal conductivity of silver to that of a carbon nanotube is.

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100 : 1

1 :100

10:1

1:10

What is the function of Head Box in paper making machine.

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It dry the paper

It reduces thickness of paper

It makes the surface of paper smooth

It discharge the pulp at the screen of fourdrinier table

The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.

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Ionic bond

Covalent bond

Mettalic bond

Co ordinates bond

Which of the following pollutant results from combustion of fossil fuels.

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SO2

NO2

CO

All above

The quantum yield of a Photo chemical reaction in

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Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

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

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

Which of the following is not correct.

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Rusting of iron can be stopped by increasing the concentration of CO2 in water

Rusting of iron is electrochemical in nature.

Rusting of iron takes place in moist air

Rusting of iron produces hydrated iron (III) oxide

Which one of the following statements if false with respect to CFT.

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In an octahederal crystal field. the d electron on a metal ion occupy the ex of orbitals before they occupy the t98 not of orbitals.

Diamagnetic metal ions cannot have an odd number of electrons

Low spin complexes can be paramagnetic

Low spin complexes contain strong field ligands.

What refers to a shape achieved by allowing a liquid to solidify in a mold.

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Casting

Molding

Forming

All of the choices

Pesticide residues appear in which of the following foods.

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Milk

Fruit

Fish

Vegetables

All above

Which of the following is not strong electrolytes.

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HCl

H2SO4

HNO3

CH3COOH

Sodium silicate is ued

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In fire proofing of wood and textiles

As a preservative of eggs

As a furniture polish

All above

Which of the following hydroxide is getatinous in nature.

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Fe(OH)3

Al(OH)3

Ca(OH)3

Cr (OH)3

The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to.

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760 mm of Hg

1 bar

101 k Pa

760 torr

All are correct

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

Solid sodium chloride does not conduct electricity be cause.

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In solid NaCl, no ions are present

Solid NaCl is covalent in nature

In solid NaCl, there is no mobility of ions

In solid NaCl, there are no electrons.

The function of boiling the sodium extract with conc. HNO3 before testing the halogens is

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To make solution clear

To make the solution acidic

To bring common ion effect

To destroy CN- and S2- ion

carbon monoxide is harmful to human beings as it.

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Is carcinogenic

Is antagonistic to CO2

Has higher affinity for haemoglobin as compared to oxygen

Is destructive to O3

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