Question # 1

Which of the following is a false statement.

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Halogens are strong oxidizing agent

Halogens show only (-I) Oxidation state

Hf molecules from intermolecular H-Bonds

Fluorine is highly reactive

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.

Which one of the following statements is not true.

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Transition metals form alloys

Transition metals form complexes

Zn, Cd and Hg are transition metals

K2[PtCl6] is a well known compound but corresponding nikel compound is not knonwn

Formula of orthophosphoric acid.

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H2PO4

H3PO3

H3PO2

H4P2O5

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

The most electronegative element of the third period is.

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F

P

Br

Cl

Which among the following is a Talse statement.

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SO3 is obtained by the catalytic oxidation of SO2

SO3 has trigonal planar geometry in gaseous state

SO3 in nauseous state has all S-O bonds equivalent

SO3 gas shows more solubility in water than in H2SO4

The common oxidation state of elements of group V A is.

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-3

+3

+5

Any above

Group IV A consist of elements.

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3

4

5

6

The central metal atom or ion and the ligands that are directly attached to it are enclosed in a square bracket called.

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Coordiantion complex

Coordination sphere

Coordination number

Coordination compounds

Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process.

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Low temperature high pressure and high concentration of reactants

Low temperature , low concentration of reactants and low pressure

High temperature high pressure and high concentration of reactants

Low temperature, low pressure and high concentration of reactants.

The correct increasing order of bond dissociation energy for N2, O2, F2 and Cl2 is

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N2 < O2 < F2 < Cl2

F2 < Cl2 < O2 < N2

F2 < Cl2 < N2 < O2

N2 < Cl2 < F2 < O2

Example of inter molecular H-bonding is

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NH3 and H2O

HF

CH3COOH

All of abvoe

Which of the following halogen exist in solid state.

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F2

I2

Cl2

Br2

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.

Nitric acid is used in manufacturing of.

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Explosive

H2SO4

Fertilizer

All above

The rusting of iron is catalysed by which of the following.

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Fe

O2

Zn

H+

The geometry of the molecule is primarily decided by

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Bond pairs around the central atom

No of k bond around the central atom

No of bond pairs as well as lone pairs around the central atom

No. of lone pairs on central atom

Which of the following have +3 oxidation states.

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B & AI

In & TI

B & In

AI & TI

The bond length is measured by

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X-ray diffraction

Neutron diffraction

Microwave spectroscopy

All of above

If Steel is heated to a temperature well below red heat and to then cooled slowly the process is called.

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Annealing

Quenching

Tempering

Nitriding

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