Question # 1

The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.

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Dipole

Radical formation

Decomposition of found

Covalent found

Which of the following elements has the highest density.

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Mg

Na

K

Rb

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

Anything that influence the valence electrons will affect the chemistry of the element Which of the following factors does not affect the valency shell.

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Valence principle quantum number in

Nuclear charge (Z)

Nuclear mass

Number of core electrons

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

The most electronegative and the most electromotive elements of the first period is

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H and He

Na and Cl

Li and F

H and He

Excluding H-atom , Hydrogen bond never involves more than atoms.

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One

Two

Three

Four

Number of unpaired electrons in Cu2+ ions are.

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1

2

3

4

Neon is used in neon signs for advertising purpose because.

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Neon lights are visible from long distance

Neon light are visible though fog & mist

Both A and B

None of the above

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

A colorless gas with pleasant odour and sweet taste.

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N2O

N2O3

NO

N2O4

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

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N2O3

HNO3

SO2

SOCl2

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

Arrange the following in order of increasing boiling point.

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CH3OH < CH3Cl < RbCl < CH4

CHOH < CH4 < CH3Cl < RbCl

RbCl < CH3Cl < CH3OH < CH4

CH4 < CH3Cl < CH3OH < RbCl

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

Variable oxidation states is shown by

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Normal eleemnts

Metallic elements

Non metallic elements

Transition elements

The most electronegative element of the third period is.

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F

P

Br

Cl

The principal ores of copper are

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Copper sulphides

Copper oxides

Both sulphides and oxides

Copper carbonate

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

The formula of copper pyrite is.

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CuFeS

CuFeS2

Cu2FEs

Cu Fe2S

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