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Chemistry Class 12 Chapter 3
Group III & IV Elements
Test 7
1.
In borax bead test blue beads are formed by?
Boron
Al
Copper
None of these
2.
Which of the following is not the use of silicon?
Lubricant
Water repellant
Antifreeze
Hydraulic breaker
3.
Commercially boric acid is prepared by?
Borax
Orthoboric acid
Corundum
Colemanite
4.
Boric acids are inter-convertible by?
Hydrogenation
Neutralization
Redox reaction
Reversal-hydrolysis
5.
The catenation phenomena is observed in?
Hydrogen
Carbon
Silicone
Gallium
6.
The coloured glassy mass in borax bead test is due to the formation of ?
Metal meta borate
Metal boride
Metal borate
Metal silicate
7.
Which one is not use of aluminum?
For milk storage tanks
As an antiseptic
Excellent conductor
Construction of air crafts
8.
Aluminum containers are used for the transportation of?
Nitric acid
Hydrochloric acid
Sulphuric acid
all acid can be used
9.
For detection of metallic cations we use?
Borax
Boric acid
Aluminum oxide solution
Boron
10.
Which one is not property of boric acid?
all are correct
Its solubility is greater in cold water
Boric acid is white crystalline solid
It is volatile
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