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Chemistry Class 12 Chapter 3
Group III & IV Elements
Test 6
1.
Borax is converted into boric acid by reacting with?
Acid
Salt solution
Base
All of these are possible
2.
Alumina oxide is?
It does not exist
Acidic in nature
Basic in nature
Amphoteric
3.
Mineral of born is?
Colemanite
Borax
All of these
Orthoboric acid
4.
One of the feature of boron is its ability to form?
Molecular crystals
Semiconductors
Molecular additional compounds
All of these
5.
Boron is non metal whereas aluminum is metal, it is due to?
Small size
Both are possible
No authorized justification
High nuclear charge
6.
Increase in atomic size in 3rd group is not regular, it is due to?
Presence of f-electrons
All of these
Presence of d-electrons
Presence of valance electrons
7.
Corundum is the most abundantly found mineral of?
Aluminum
Boron
Gallium
Indium
8.
Borax is a white crystalline solid and it is?
Not soluble in water
More soluble in clod water
Have same solubility
More soluble in hot water
9.
The metal used in thermite process because of its activity is?
Copper
Zinc
Iron
Aluminum
10.
Boron does not form stable cation due to?
Boron in does not exists
It has high nuclear charge
It is non metal
Boron has smaller size
11.
Which element does not belongs to 3rd group?
Titanium
Aluminum
Indium
Boron
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