Question # 1

What element is the most abundant by mass in the Earth's crust.

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Fe

H

O

K

Zinc oxide is.

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A basic oxide

An amphoteric oxide

An acidic oxide

A neutral oxide

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

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

Which of the following hydroxide is amphoteric.

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B(OH)3

Al(OH)3

Ga (OH)3

In (OH)3

Phosphoric acid is the most important of the phosphorus oxy acids. Industrially phosphoric acid is prepared by.

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The Ostwald process

The Haber's process

The reaction of phosphate rock with sulphuric acid

The reaction P4O10 with water.

H2SO4 is used

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In the preparation of aqua regia

In the purification of gold and silver

In the dental filling

None of above

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

The element with maximum first ionization energy is.

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B

N

O

C

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

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

On hybridization of one s and one p orbitals we get.

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Two mutualy perpendicular orbitals

Two orbitals at 180^o

Four orbitals directed tetrahedrally

Three orbitals in a plane

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.

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Halides

Hydrates

Clathrates

All of above

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

Lithium shows diagonal relationship with

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Beryllium

Sodium

Magnesium

Calcium

Which one of following is paramagnetic and has the bond order equal to 0.57

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N2

H2+

O2

F2

The movement of an electric charge produce a magnetic field is known from the

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Elementary Physics

Elementary Chemistry

Both A and B

None of above

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4

The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are.

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2 ,1

2,2

3,1

3,0

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

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