Question # 1

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal

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N2O5

HNO3

SO2

SOCl2

Which of the following generally increases on going from top to bottom in a group.

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Metallic charcter

Electronegativity

Oxidising behaviour

Raducing behaviour

Valence bond theory is also called as

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Electron pair theory

Band theory

Electron gas theory

Electron pool theory

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

For covalent bond to form between two atoms A and B

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Transference of electrons must take place from A to B

A pair of electrons of A is shared by both A and B

A and B contribute equal no. of electrons for mutual sharing by A and B

One of the atom A or B must already have octet of electrons.

The oxidation number Xe in XeOF2 is

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0

+2

+4

+3

Aluminium hydroxide is.

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An acid

An amphoteric hydroxide

A base

An explosive hydroexide

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

A^o or 10 Dq is called crystal field.

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Energy

Splitting energy

Stabilization energy

None of above

The formula of hexa borane is.

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B4H10

B6 H10

B5 H9

B8 H12

The concept is also known as proton donor acceptor system.

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Bronsted Lowery

Lewis

Lux Flood

Usanovich

The bond between two identical non metal atoms has a pair of electrons.

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Unequally shared between the two

Transferred fully from one atom to another

With identical spins

Equally shared between them

In Ostwald's process of manufacturing nitric acid a mixture of ammonia gas with air is mantained with ratio.

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1 : 4

1 :3

1: 8

1 : 10

The name hydrogen was proposed by.

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Lavoisier

Rutherford

Henry Cavandish

Scheele

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

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

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

Commercial or the phosphoric acid is pure.

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37.0%

82.98%

88.25%

90.12%

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

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Mg

Rb

Li

Ca

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Pick out the incorrect statement for CIF3

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It has trigonal planar geometry

It is used to make gaseous UF6 which is useful in making enriched U-235 fuel

It is used as powerful fluorinating agent for inorganic compounds

CIF2 has been used as fuel in short range rockets reating with hydrazine.

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