Question # 1

Kaolin is a mineral of

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Carbon

Magnesium

Silicon

Aluminium

Boric acid cannot be used

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As antiseptic in medicine

For washing eyes

In soda bottles

For Enamals and Glazes

Which one of the following compounds of lead is red in colour

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PbO

Pb2O

Pb3O4

PbCO3

A solution of borax in water is.

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Acidic

Alkaline

Neutral

None of these

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

Which element burns in nitrogen atmosphere to form nitride.

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Mg

Al

Both a and b

None of these

Aluminium oxide is.

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Acidic oxide

Basic oxide

Amphoteric oxide

None of these

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

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

The composition of white lead is

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PbCO3.Ph(OH)2

PbCO3.2Pb(OH)2

2PbCO3.Pb(OH)2

PbCO3

Boric acid can not be used.

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As antiseptic in medicine

For washing eyes

In soda bottle

For enamels and glazes

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

Boric acid is used as eye wash due to its

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Weakly acidic property

Antiseptic nature

Antibiotic nature

Weakly basic properties

silicones are

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Some salts of sodium

Allotropes of SI

Inorganic polymers

Coloured compounds of Si

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

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