Question # 1

The colour imparted by lithium to the flame is.

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Golden yellow

Grasay green

Violet

Red

H-Bond has more energy than the van der Waals forces i.e.

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1.0 kcal/mole

2.0 k cal/mole

10.0 kcal/mole

20. 0 kcal mole

Co ordinate compounds are

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Polar

Non polar

Dem polar

None of above

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

The specific gravity of H2SO4 is

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1.37

1.84

1.17

1.57

The three isotopes of hydrogen differ from one another in

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Atomic number

Number of protons

Nuclear charge

Nuclear mass

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

Type of hybrid orbitals used by the chlroine atom in CIO2 is.

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sp2

sp3

sp

None of these

Which of the following is not a property of aluminium.

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An efficient electrical conductor

A low density compared to other metals

Is amphoteric

Toxic to humans

Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.

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s- block

p-block

d-block

f-block

in monel metal copper is alloyed wiht which metal.

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Fe

Mn

Ni

All

In smelting process the ore is mixed with

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Silica

Coke

Limestone

All

Lewis concept explain the formation of

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Ionic bond

Covalent bond

Co-ordinate bond

Chemical bond

Which of the following is not true as compared with alkaline earth metals.

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Alkali metals are more reactive

Alkali metals have lower density

Alkali metals are more electro positiveness

Alkali metals have stronger metallic bonds

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

The concept is also known as proton donor acceptor system.

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Bronsted Lowery

Lewis

Lux Flood

Usanovich

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

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Beryl

Silica

Asbestos

Clays

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

Which of the elements of group II A has the highest value of IE.

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Mg

Be

Ca

Sr

Dry ice is

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Solid CO

Solid CO2

Solid NH3

Solid SO2

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