Question # 1

The oxidation state of Pt in Xe+ [Pt F6] is

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+4

+5

+6

None of these

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

Transition elements, in general, exhibit the following properties, except one, Name that property.

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Variable oxidation state

Natural radioactivity

Tendency to form complexes

Formation of alloys

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

Which is the purest form of iron.

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Pig iron

Cast iron

Wrought iron

Steel

The polarity of bonds can lead to polarity of molecules and affect

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Melting point

Boiling point

Solubility

All of above

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

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

The concept of telluric helisx was developed by

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Lother meyer

A.E. de Chancourtois

New lands

Doberieiner

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

In the extraction of iron, the furnace change consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidizing agent

A reducing agent

Flux

Slag

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

Which are not considered member of d-block elements.

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Zn

Cd

Hg

All above

Which of the following is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

How pig iron is usually obtained from

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iron pyrite

Limonite

Hematite

Siderite

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

Metal crystallize is system having co ordination number

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8

12

14

any one of above

Which of the following statement is true.

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Ferromagnetic separation is used to remove rion impurities from bauxite.

Aluminium is an amphoteric element which means that it can act as an oxidizing agent and as a reducing agent

Aluminium has a strong attinity for oxygen

Aluminothermic reactions are endothermic

What % if nickel is present in the major ore Pentlandite.

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22%

18%

14%

10%

Which of the following elements has the highest value of IE.

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Na

K

Mg

Ca

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