Question # 1

Aluminum oxide is

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acidic oxide

basic oxide

amphoteric oxide

none of these

The shape of SiO2 IS

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Tetrahedral

Trigonal bipyramid

Linear

Cubic

Aluminium does not corrode because.

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It is a semi metal

It is a silver shining metal

It does not react with O2

It forms a protective layer of Al2O3

Which element forms on ion wiht charge 3+

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Beryllium

Aluminium

Carbon

silicon

Lead monoxide is

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Amphoteric

Neutral

Acidid

Basic

In which substance silicon is not present.

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Talc

Asbestos

Dolomite

Zirocon

Boron usually exist in nature as

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Borides

Oxborates

Free element

It is a artificial element

Which one of the following elements exhibits s-inert pair effect.

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B

Al

Pb

Sc

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

--------------- element forms an ion with charge 3⁺

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Beryllium

Aluminium

Carbon

Silicon

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

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

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Tron

Copper

Aluminium

Zinc

Aluminum reacts with nitrogen to form

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AIN

Al₂N

Al₂N₃

Al₄N₆

Kaolin is a mineral of

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Carbon

Magnesium

Silicon

Aluminium

Boric acid can not be used.

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As antiseptic in medicine

For washing eyes

In soda bottle

For enamels and glazes

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

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

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Silicon

Aluminium

Sodium

Oxygen

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

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Silicon

Aluminium

Sodium

Oxygen

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