Question # 1

Which of the following ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

20 micron =____________________ nm

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20 x10^-9

20000

200

20x10⁹

Gold dissolves in aqua regia forming

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AuCl

Au(NO3)3

AuCl3

HAuCl4

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

Titanium dioxide shows the lattice strcuture.

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Flluorite

Rutile

Wurtzite

Zeolite

__________ is used for fruits, vegetables and tobacco

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Potassium Chloride

Potassium Sulphate

Potassium nitraite

All above

The suffix "ate" at the end of the name of the compiled signifies that it is.

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Cation

Anion

Neutral

None of above

The reduction in ozone layer would lead to

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Temperature chages

Rainfall failure

Increase uv radiation on earth

All above

The units of surface tension in SI system are

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Joule m-1

Newton m-1

Erg cm-1

Dynes cm-2

Monomer of Nylon -6 is

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Adipic acid

Hexamethylenediamine

Caprolactam

All of these

Which of the following solution would have the largest depression in freezing point.

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1% glucose

1 % KCl

1 % AlCl3

1 % BaCl2

1 nanometre =___________ cm

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10^-9

10^-8

10^-7

10^-6

The number of Glass products now manufactured is.

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25,000

75,000

50,000

All of these

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

Which of the following represents the correct order of ionic radii

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La+ < Na+ < K+ < Rb+

Li+ > Na + > K+ >Rb+

Li = Na + = K+ = Rb+

Rb +> Na+> K+ > Li+

Which of the following represent the fuming sulphuric acid

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H2S2O4

H2S2O3

H2S2O6

H2S2O7

The formula of hexa borane is.

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B4H10

B6 H10

B5 H9

B8 H12

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

The vapours attacks the eyes and mucous membrane of nose and throat

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F

Cl

I

Br

Which of the following statement is not relat4ed wiht SO2

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It is a colourless gas

It has sharp and pungent odour

It is moderately soluble in water

It is reduced slowly in clear air to H2S

The different types of glass are.

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A- glass, C-Glass, E-Glass and S-Glass

A-Glass, B-Glass, E-Glass, S-Glass

AR -Glass, C-Glass, E-Glass and S -Glass

A-B Glass

Which of the following steps in involved in the metallurgy of aluminium.

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Purification of bauxite

Electrolytic reduction of alumina

Refining of aluminum

All above

A system which can exchange energy as well as natter with its surrounding is said to be a/an

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Closed system

Inert system

Open system

All of above

A minor constant is one whose amount in the sample is

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0.1 to 1 %

0.01 to 1%

1 to 10%

None of the above

Which of the following is not a characteristic of covalent compound.

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They have low melting and boiling points.

They ionize on dissolution in polar solvents

Their molecules have definite geometry

They are generally insoluble in water

The light absorbed in UV and visible region causes.

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Vibrational energy changes

Rotational energy changes

Electronic excitation

All of these

In which pair of species, the Lewis formula contain same number of Lone pairs and bond pairs but they are not iso electronci.

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O2 B2

SO2, O3

PCl3, BF3

SOCl2, COCl2

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

Which of the following is capable of shown g optical isomersm.

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CH3COCOOH

CH3CHOHCOOH

Botha a and b

All of these

Soap and detergent remove the direct form clothes due to.

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Osmosis

Gravity

Lowering of interfacial tension

Diffusion

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

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