Question # 1

Which of the following statements regarding covalent bond is false.

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The electrons are shared between atoms.

The bond in non -directional

The strength of the bond depend upon the extent of overlapping

The bond formed may be polar or non-polar

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Which pair of species can undergo chemical reaction with each other.

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CO+ NO

LiH and H2O

CO2 and HCl

CaH2 and SI H4

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.

Which of the following process is used for the conversion of matte is to nickel.

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Orford process

Mond's process

Electrolytio process

All

The ionization potential of K would be numerically equal to.

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Electron affinity of Ar

Electromagnetically of K

Electron affinity of K+

ionization energy of Ca

At high temperature nitrogen combines with calcium carbide to give

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Calcium cyanide

Calcium cyanamide

Calcium nitride

Calcium cabonate

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

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

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

NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.

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NH3 is not a planar molecule while BF3 is a planar molecule.

NH3 is a planar molecule, while BF3 is a planner molecule.

Fluorine is more electronetative than nitrogen

Born is more electronegative than nitrogen

Magnesium burns in air to give.

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MgO

MgCO3

Mg3N2

Both A and C

Pick out the incorrect statement for Xe F6

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XeF6 is hydrolyzed practically to form XeOF4

It reacts with SiO2 to form Xe F4

On complete hydrolysis, it forms XeO3

It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.

Which of the following is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

The vapours attacks the eyes and mucous membrane of nose and throat

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F

Cl

I

Br

The oxidation state of HCiO4

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+ 7

+ 3

+ 5

+ 1

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

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ns2

ns2 np6

ns2 np6 nd 10

ns2 np3

According to systematic nomenclature which hydrogen compound is sulphane.

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HF

Si H4

SF4

H2S

Which of the following is not a property of Ni.

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it is a soft silvery white metal

It is malleable and ductile

It is highly magnetic

It has high electrical and thermal conductivities

The structure of SO2 is

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Linear

Angular

V-shaped

Planner

Used in Geiger counter to detect radioactivity

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He

Ne

Ar

Kr

More Classes

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