Question # 1

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2 np6

ns2 np6 nd 10

ns2 np3

ns2

Co ordinate covalent bond found is formed by the

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Transference of electrons

Sharing of electrons

Donation of electrons

None of these

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

BCl3 is an example of hybridization

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sp

sp2

sp3

None of above

The ion that is isoelectornic with CO is

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CN-

O2+

CO2-

N2+

Metallic magnesium is obtained by

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Reduction of MgO with Coke

Electrolysis of an aqueous solution of MgCl2

Electrolysis of molten MgCl2

Displacement of magnesium by iron form MgCl2 solution.

In the Mendeleev's periodic table elements are arranged in the increasing order of their .

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Numbers of neutrone.

Atomic number

Atomic mass

Atomic volume

The order in O2+ is

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1.0

1.5

2.0

2.5

d2 sp3 is oriented in a manner

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Trigonal

Tetrahedral

Octahedral

Trigonal bipyramidal

Drying agent which react with CO2 and removes water vapours is.

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CaO

CaCl2

CaCO3

Ca(NO3)2

pKa value of hyponitrous acid is.

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-7.0

8.9

4.1

6.6

Which of the following is not true of ozone.

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It is a strong electilizing agent

It attacks organic compounds containing carbon carbon double bond

Its molecular is linear and has two different O-O bond lengths

It is more powerful oxidising agent at molecular oxygen

The process in which ore is heated generally in the presence of air, at temperature below their melting points is called.

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Calcination

Roasting

Fourth floatation

besemerization

Shows a regular increase on moving down the group form carbon to lead

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Atomic volume

Atomic radius

Density

All above

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

Which of the following statements in incorrect.

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Sodium hydride is ionic

Beryllium chloride is covalent

CCl4 gives a white ppt with AgNO3 solutions.

Bonds in NaCl are non directional

Which of the following molecule does not contain the covalent bond between similar atoms.

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N2H4

F2O2

H2F2

H2O2

Phosphorus has the oxidation state of +3 in

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Orthophosphoric acid

Hypophosphoric acid

Metaphosphoric acid

Orthophosphorus acid

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