Question # 1

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

Aluminium oxide is.

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Acidic oxide

Basic oxide

Amphoteric oxide

None of these

Tincal is a mineral of.

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Al

B

Si

C

Which one of following is used in cosmetics

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Talc

Asbestos

Sodium sulphate

Aluminium Sulphate

Ethyl alcohol on reacting with orthoboric acid form

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Ethyl borate

Boric acid

Boron acetate

Borax

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

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B

Al

Pb

Sc

Boric acid cannot be used

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As antiseptic in medicine

For washing eyes

In soda bottles

For Enamals and Glazes

Aluminum reacts with nitrogen to form

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AIN

Al₂N

Al₂N₃

Al₄N₆

Ortho boric acid on strong beating gives.

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Borax

Boron oxide

Metaboric acid

Tetraboric acid

Which element burns in nitrogen atmosphere to form nitride.

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Mg

Al

Both a and b

None of these

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

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Silicon

Aluminium

Sodium

Oxygen

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

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

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Iron

Copper

Aluminium

Zinc

The chief of aluminum is

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Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

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

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

Tincal is a mineral of

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Al

C

Si

B

Which one of the followings is not ore of aluminium

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Coruridum

Bauxite

Colemanite

Kaolin

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