Question # 1

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

H-Bonding also ox in ling system like

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Protein

DNA

Botha A and B

None of above

How pig iron is usually obtained from

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iron pyrite

Limonite

Hematite

Siderite

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

After assimilation urea leaves behind in the soil

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NH3

CO2

Both A and B

None of above

Which of the following state is not true with respect to copper.

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it is malleable and ductile

It is a best conductor of heat and electricity

It forms alloys easily

Moltan copper absorbed carbon dioxide

Which of the following has the maximum tendency to form complexes.

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K

Na

Rb

Li

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

Which of the following does not apply to metallic bond.

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Overlapping valence orbitals

Mobile valency electron

Delocalized electrons

Highly directed bonds

Xenan hexaflouride at 47.7 ^oC is

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Colorless solid

yellow solid

Yellow liquid

Colorless liquid

Magnalium is alloy of Aluminium which is used in

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Scientific apparatus

Aircraft parts

Rail road care

Boat machinery

The important condition for the formation of chemical bond is that.

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Their electron clouds should not diffuse

Both atoms should have high electron affinites.

Both atoms should have same electronegativities

The process should be accompanied by the lowering in potential energy.

Which of the following elements is most electropositive.

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C

N

O

Be

The process of heating to redness and then slow cooling in known as

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Tempering

Annealing

Quenching

Hardening

Which of the following species have undistributed octahedral structure.

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SF6

PF6

Si F₆^2-

XeF6

Which of the following is an alloy of copper

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Brass

Bronze

Monel metal

All

The correct order of second ionization potential of carbon nitrogen, oxygen and fluorine is.

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C > N > O > F

O > F > N > C

O > N > F > C

F > O > N > C

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.

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Soft base

Hard Base

Soft acid

Hard acid

Molecule is a diatomic

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Nitrogen

Phosphorous

Arsenic

Antimony

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