Question # 1

The most important conditions for the formation of ionic bond are.

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High ionization energy of the metallic atom and high electron affinity of the non metallic atom.

Low ionization of the metallic atom and low electron affinity of the non metallic atom.

Low ionization energy of metallic atom and high electron affinity of the non metallic atom

High ionization energy of the metallic atom and high electron affinity of non metallic atom.

Which of the following elements has the highest melting point.

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Magnesium

Calcium

Strontium

Berylliium

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

Non localised bonds are referred as

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Metallic bond

Long range bonds

Ionic bond

Covalent bonds

A molecule the cannot be susperimposed on its mirror image is said to exhibit which of the following.

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Geometrical isomerism

Optical isomerism

Linkage isomerism

Reactive isomerism

A type of a chemical bond which is formed by the mutual sharing of electrons between combining atoms of the same or different elements is called.

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Ionic bond

Covalent bond

Co ordinate Covalent bond

Metallic bond

Which of the following represent the fuming sulphuric acid

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H2S2O4

H2S2O3

H2S2O6

H2S2O7

Carbides because of their hardness are

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Ionic carbides

Interstitial carbides

covalent carbides

Any of above

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

Which of the following impurities are present with the bauxite.

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Silica

Ferric oxide

Alumina

Both silica and ferric oxide

If the absorbed light is green the transmitted light will be

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Purple

Orange

Violet

Black

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

Major achievement of CFT is

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Interpreting the color

Adsorption spectra

Both A and B

None of above

With which one of the following configurations, the lowest value of first IE is associated.

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Is2, 2s2, 2p6, 3s1

1s2, 2s2, 2p5

1s2, 2s2, 2p6

1s2, 2s2, 2p6, 3s2, 3p2

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

An element with atomic number 20 is placed in which period of the periodic table.

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1

2

3

4

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2 np6

ns2 np6 nd 10

ns2 np3

ns2

What element is the most abundant by mass in the Earth's crust.

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Fe

H

O

K

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

Hydrolith is the common name of

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NaH

CaH2

NaF

CaF2

In B2H6 molecule

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There exists a direct B-B a -bond

All the atoms are in one plane

All the B-H bonds are normal covalent bonds

There exist two bonds between the boron atoms.

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