Group IIIA and IVA Elements


Boron in soil has been considered micronutrient for
A. Soil porocity B. Proper growth of plants
C. Alkalinity of soil D. All
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B
One of the outstanding features of boron is its ability to form
A. Molecular addition compounds B. Molecular crystals
C. Semiconductors D. Ionic compounds
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A
Special features of borate glass is that it is
A. Heat resistant B. Low melting
C. Used to prepare chemical garden D. Green in colour
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A
. The process of aluminium extraction is called
A. Hall process B. Thermite process
C. Haber process D. Contact process
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A
Silicon differ from silica by a group of
A. Ch3 B. ?OH
C. OCH3 D. O2
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A

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