Chemistry MCQS for Class 12 Chapter 3

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Which is used in the leather industry
Boric oxide
Tetra Boric acid
Borax
Boric acid

Chemical composition of colemanite is
CaB4O7. 4H2O
Ca2B6O11. 5H2O
Na2B4O7.4H2O
CaNaB5O9. 8H2O

Which electronic configuration corresponds to an element of group III-A of the Periodic Table
1s2,2s2,2p6,3s2,3p6,4s6
1s2,2s2,2p6,3s2,3p1
1s2,2s2,2p6
1s2,2s2,3s2,3p3

Aluminum oxide is
amphoteric oxide
acidic oxide
none of these
basic oxide

Kaolin is a mineral of
Aluminium
Magnesium
Carbon
Silicon

Which one of following is used in cosmetics
Aluminium Sulphate
Asbestos
Sodium sulphate
Talc

The chief of aluminum is
Al2O3
Al2O3.2H2O
Al2O3.H2O
Na3AlF6

The aqueous solution of Borax
Acidic
alkaline
Amphoteric
manual

#NAME?
Aluminium
Zinc
Tron
Copper

————— element forms an ion with charge 3+
Beryllium
Carbon
Aluminium
Silicon

Aluminum reacts with nitrogen to form
Al2N
Al2N3
AIN
Al4N6

Which of the following elements is not present abundantly in earth’s crust
Sodium
Aluminium
Oxygen
Silicon

Which element form an ion with charge +3
Carbon
Beryllium
Sillicon
Aluminum

Tincal is a mineral of
C
B
Al
Si

Aluminium oxide is
None of these
Baric oxide
Amphoteric oxide
Acidic oxide

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