Question # 1

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

Ionization potential of carbon is.

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11.2

7.8

8.1

7.3

Pick out the incorrect statement for XeF4

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XeF4 disproportionate violently with water

It is used as fluorinating agent

It has octahedral structure for geometry

It oxidizes I to I₂

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

The following oxo acids have been arranged in the order decreasir acid strength identify the correct order.

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III > IV > II > I

III > II > I >IV

I > II >III > IV

IV > III > II > I

Which of the following process is not involved in the purification of bauxite.

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Bayer's process

Serpek's process

Hall's process

Goldsmith's process

Commercial or the phosphoric acid is pure.

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37.0%

82.98%

88.25%

90.12%

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

The first ionization energy of Mg is lower than

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Na

Ca

Al

Be

Magnesium burns in air to give.

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MgO

MgCO3

Mg3N2

Both A and C

The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

Stainless steel contains

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Fe+Cr+Ni

Fe+Ni+Cu

Fe + Cr+ Cu

Cu + C + Ni

The silicate chains are present in

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Silica

asbestos

Beryl

Clays

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

An ionic compound X + Y - is most likely to be formed if

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Ionization enthalpy of X is high electron gain ethalpy of Y is low

Ionization enthalpy of X is high electron gain enthalpy of Y is high

Ionization enthalpy of X is low,electron gain enthalpy of Y is low

Ionization enthalpy of X is low electron gain enthalpy of Y is high

Ionic compounds in general possess both

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High melting point and non -directional bonds

High melting points and low boiling poinits

Directional bonds and low boiling points

High solubility in polar and non -polar bonds.

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

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