Question # 1

Aluminium oxide is

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Acidic oxide

Baric oxide

Amphoteric oxide

None of these

Aluminium oxide is.

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Acidic oxide

Basic oxide

Amphoteric oxide

None of these

Which is used in the leather industry

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Borax

Boric acid

Boric oxide

Tetra Boric acid

Which one of the followings is not ore of aluminium

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Coruridum

Bauxite

Colemanite

Kaolin

The composition of white lead is

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PbCO3.Ph(OH)2

PbCO3.2Pb(OH)2

2PbCO3.Pb(OH)2

PbCO3

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

Boric acid can not be used.

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As antiseptic in medicine

For washing eyes

In soda bottle

For enamels and glazes

The shape of SiO2 IS

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Tetrahedral

Trigonal bipyramid

Linear

Cubic

A solution of borax in water is.

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Acidic

Alkaline

Neutral

None of these

Which electronic configuration corresponds to an element of group III-A of the Periodic Table

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1s²,2s²,2p⁶,3s²,3p¹

1s²,2s²,2p⁶,3s²,3p⁶,4s⁶

1s²,2s²,2p⁶

1s²,2s²,3s²,3p³

Which of the following elements is not present abundantly in earth's crust

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Silicon

Aluminium

Sodium

Oxygen

The chief of aluminum is

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Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

------------- metal is used in the Thermite process because of its reactivity

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Tron

Copper

Aluminium

Zinc

Boron usually exist in nature as

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Borides

Oxborates

Free element

It is a artificial element

Which element form an ion with charge +3

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Beryllium

Aluminum

Carbon

Sillicon

Which metal is used in the thermite process because of its activity.

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Iron

Copper

Aluminium

Zinc

Aluminium is used for making petrol and milk storage tanks because it is

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Conductor

Non magnetic

Excellent reflected

Corrosion resistant

In which compound, the oxidation state of boron in not +3

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

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