Question # 1

Monomers are Teflon is

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Monochloroethene

1,2- Difluoroethene

1,1,2- Trifluoroethene

Tetrafluoroethene

Boron does not form B3+ ion because.

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It has small size and high ionization energy

It has high electromagnetically

It has high charge density

None of the above

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

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Which of the following does not form stable diatomic molecule.

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Nitrogen

Phosphorus

Hydrogen

Oxygen

Stereotsomers not related to each other as object and minor image are called.

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Enantiomers

Diastereolsomers

Conformations

Antipodes

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

The process of extracting a metal in pure form its ores is known as.

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Crushing

Grinding

Dressing

Metallurgy

Group IV A consist of elements

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3

4

5

6

Which of the following statements is not true with respect to atomic spectroscopy.

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Atoms are simplest form of matter

Atoms cannot rotate or vibrate as molecules do

Only electronic transitions within atoms take place

Band spectra are observed

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

The correct order of thermal stabilities of hydriedes of group 15 is.

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NH3 > PH3 > AsH3 > BiH3> SbH3

NH3 > PH3 >AsH3 > SbH3> BiH3

NH3 < PH3 < SbH3 > AsH3 > BiH3

BiH3 > Sb H3 > AsH3 > PH3 > NH3

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

Neon is used in neon signs for advertising purpose because.

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Neon lights are visible from long distance

Neon light are visible though fog & mist

Both A and B

None of the above

Oil of turpentine contains.

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a-pinene

p- pinene

Both A and B

None of these

Which of the following state is not correct regarding Langmunir adsorption theory.

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Adsorbent has specific equivalent sites

One site can adsorbs only one molecule

Adsorbed molecules cannot interact with each other

Adsorption is a static process

What is prefix in steel identification means it is made in an electric furnaced.

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E

H

B

Z

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

The decreasing order of the second ionization energies of K, Ca and Ba is

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K > Ca > Ba

Ca > Ba > K

Ba > K > Ca

K > Ba > Ca

Which of the following is the third most abundant element in the nature.

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Oxygen

Sulphur

Aluminum

Hydrogen

The first ionization energies of the elements of the first transition series. (Ti _____ Cu)

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Increases as the atomic number increases

decreases as the atomic number increases

Do not show any change as the addition of electrons takes place in the inner (n-1) d -orbitals.

Increases from Ti to Mn and then decreases from Mn to Cu

Total pressure exerted by a mistress of two or more than two gases in a definite volume as any given temperature is equal to the sum of partial pressures which each gas would exert, if it occupied the same volume alone, at the same temperature This is a statement.

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Boyle's law

Charle's law

Graham's law

Dalton's law

The basic strength of hydrides of group 15 elements very in the following order.

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NH3 > PH3 > AsH3 > SbH3 >BiH3

PH3 > NH3 > AsH3> SbH3 > BiH3

BiH3> NH3 >PH3 > AsH3 > SbH3

NH3 > PH3 > SbH3 > AsH3 > BiH3

Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere.

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Polyhalogens

Ferrocene

Freons

Fullerencs

The main constituents of ___________ are boron oxide and silica.

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Pyrex glass

Low silica glass

Soda lime glass

Super hard glass

What element constitutes the major component of most bronzes.

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Tin

Zinc

Carbon

Aluminum

Valences bond theory was put forward by

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Pauling and Slatter

Heitler and London

Lewis

Pauli

Which of the following statement is not true with respect to electrode potential.

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Feasibility of a chemicals reaction

Rate of chemical reaction

Nature of a chemical reaction

Free energy of a chemical reaction

Artificial nitrogen fixation may occur by the formation of.

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Nitric acid

Ammonia

Nitrides

Any of above

Which one of the following statements regarding BF3 is not correct.

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It is an ionic compound

It is an electron deficient compound

It is a Lewis acid

It forms adducts

The co ordination number of atoms in a hexagonal closed packed structure is

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2

6

12

4

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