Question # 1

Which of the following is not a property of aluminium.

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An efficient electrical conductor

A low density compared to other metals

Is amphoteric

Toxic to humans

The most abundant metal in earth's crust is.

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Fe

Al

Ti

Ca

Nitric acid is used in the manufacturing of.

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Dyes

Drugs

Artificial silk

All above

In XeF2 molecules, Xe atom undergoes hybridization

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spd

sp2

sp3

sp3d

Among alkali metals, the least metallic element is.

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Li

Na

Rb

Cs

Oxalic acid when heated withe conc. H2SO4 it gives out.

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H2O and CO2

CO and CO2

CO2 and H2S

Oxalic sulphate

iodine is used as

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Tincture of iodine

Iodex and antiseptic

Treatment of goiter

All above

Mangalium is an alloy of.

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Al + Mg

Mg + Ai + Mn

Mg + Ai + Cu

Mg + Ai + Cu + Mn

Which of the following parameter is not involved in calculations based on Born Haber Cycle.

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Ionization enthalpy

Electron gain enthalpy

Electronegativity

Bond dissociation energy

CoCl3 ,6NH3 has six NH3 molecules that satisfy the valency of the Cu3+ metal ion

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Primary

Secondary

Both A and B

None of above

What is the following is incorrect.

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Water is more polar than H2S

H2O2 is a planar molecule

Heavy water is produced by the exhauative electrolysis of water made acidic

H2O2 act both as oxidising as well as reducing agent in acidic medium

Has the highest value of electronegativity

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F

Cl

Br

I

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.

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Coloured

Colourless

White

None of above

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

Which one of the following is not correct.

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Ar is used in electric bulbs

Kr is obtained during radioactive decay

Boiling point of H2 is lowest among all noble gases.

Xe forms Xe OF4

The decreasing order of the second ionization energies of K, Ca and Ba is

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K > Ca > Ba

Ca > Ba > K

Ba > K > Ca

K > Ba > Ca

Ionic bond are also forces called as.

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Polar bond

Electrovalent bond

None polar bond

Both A and B

The matrix is usually in the form of.

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Sand

Limestone

Rocks

All

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

Pick out the incorrect statement for SO2

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It turns filter paper moistened with acidified K2Cr2O7

It turns starch iodate paper blue

It does not react with chlorine in presence of charcoal

It decolourises acidified KMnO4 solution.

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