Question # 1

The penultimate shells have pscudo inert gas type configuration.

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Ga

In

TI

All above

The formula of Tetraboric acid is.

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H2BO3

HBO2

H2B4O7

H6B4O9

The law of triads is applicable to

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Lithium, beryllium, boron

Fluorine, chlorine, bromine

Chlorine, bromine, iodine

Sodium, potassium, Rubidium

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 number of electrons involved in bonding in Lewis structure of oxalate ion is

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20

14

22

18

Increasing oxygen contents in oxyacids leads to.

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An increase in thermal stability

An increase in acid strength

A decrease in oxidizing power

All above

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

Pick out the incorrect statements for transition metals.

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They have low melting and boiling points

5d-element have higher energies than 3d or 4 d elements

Zr and Hf have almost identical atomic and ionic radii

They form interstitial compounds.

The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.

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Soft base

Hard Base

Soft acid

Hard acid

The bond order for BO molecule is.

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2.5

3.0

2.0

3.5

Which of the following exists as polymeric chains in solid state.

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Sr Cl2

Ba Cl2

MgCl2

BeCl2

The noble gas which was discovered first in the sun and then on the earth is.

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Helium

Neon

Argon

Xenon

Transition metal possess

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Definite color

Catalytic power

Both A and B

None of above

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

The attraction which exists between carbon dioxide molecules in solid carbon dioxide is due to.

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Van der Waal's forces

Molecule ion forces

ionic bonds

hydrogen bonds

Which of the following is an alloy of copper

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Brass

Bronze

Monel metal

All

Which of the following is an example of super octet molecules.

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C1F3

IF7

PCl5

All the three

Aluminium hydroxide is.

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An acid

An amphoteric hydroxide

A base

An explosive hydroexide

Molecule is a diatomic

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Nitrogen

Phosphorous

Arsenic

Antimony

One of the best fluorinating agent is

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XeF2

XeF4

XeF6

None of above

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