Question # 1

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

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B

Al

Pb

Sc

In which substance silicon is not present.

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Talc

Asbestos

Dolomite

Zirocon

The aqueous solution of Borax

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Acidic

alkaline

Amphoteric

manual

silicones are

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Some salts of sodium

Allotropes of SI

Inorganic polymers

Coloured compounds of Si

Boric acid cannot be used

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As antiseptic in medicine

For washing eyes

In soda bottles

For Enamals and Glazes

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

Boric acid is used as eye wash due to its

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Weakly acidic property

Antiseptic nature

Antibiotic nature

Weakly basic properties

Third abundant element on earth crust is.

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Boron

Oxygen

Aluminium

Silicon

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 chief of aluminum is

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Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

Aluminum reacts with nitrogen to form

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AIN

Al₂N

Al₂N₃

Al₄N₆

Which element forms on ion wiht charge 3+

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Beryllium

Aluminium

Carbon

silicon

Which one of following is used in cosmetics

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Talc

Asbestos

Sodium sulphate

Aluminium Sulphate

Which element form an ion with charge +3

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Beryllium

Aluminum

Carbon

Sillicon

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

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Beryllium

Aluminium

Carbon

Silicon

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

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Iron

Copper

Aluminium

Zinc

Lead monoxide is

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Amphoteric

Neutral

Acidid

Basic

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