Question # 1

Duralumin is an alloy of.

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Mg + AI

Ai+ Mg+Mn

Mg + Ai + Cu

Mg + Ai + Cu + Mn

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

Electronegativity of Oygen is.

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2.5

3.5

2.4

2.1

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

Nitric acid is used in the manufacturing of.

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Dyes

Drugs

Artificial silk

All above

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

Which one of the following ions is colourless.

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Cu+

Co2+

Ni2+

Fe3+

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

Which element out of the following can ehibit a maximum con valency of seven.

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Chlorine

Sulphur

Fluorine

both Cl and F

According to SHAH concept the Lewis bases were classified on the basis os.

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Charge ion size

Polarization consideration

Electron and co coordinating ability

All of above

Which one of the following does not exhibit paramegnetion.

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NO

NO2

CiO2

CIO-2

Which of the following statements is worng.

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Covalent compounds are generally soluble is polar solvents

Covalent compounds have low melting and boiling point.

Ionic solids do not conduct electricity is solid state

Ionic compounds conduct electricity in the fused state.

Ionic reactions mainly take place in.

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Aqueous solutions and organic solvents of high polarity

Non aqueous solvents of low polarity

Gaseous state

Solid state

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

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

The three dimensional silicate anion (Si2O5^2-)n is present in

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Beryl

Silica

Asbestos

Clays

The bonding of transition metal complex was not well understand until the pioneer work of.

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Ps JAISWAL

GS MANKU

BR thukral

Alfred Weriner

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

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

H-Bond has a preferred bonding direction like

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Ionic bond

Covalent bond

Co ordinate bond

None of these

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

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