A. iron
B. copper
C. aluminium
D. zinc
A. Cu
B. Cr
C. Ni
D. A1
A. Tincal
B. Boric acid
C. Calcium carbonate
D. Colemanite
A. Soil porocity
B. Proper growth of plants
C. Alkalinity of soil
D. All
A. H2SnO3
B. H2SiO3
C. H3AsO4
D. H3SbO4
A. Pb2O
B. Pb3O4
C. PbO2
D. All of the above
A. decrease
B. increase
C. remains constant
D. first decreases then increases
A. metal borate
B. metal meta borate
C. metal boride
D. metal silicate
A. it has small size
B. it has high nuclear charge
C. it forms molecular addition compounds
D. all of the above
A. Ch3
B. OH
C. OCH3
D. O2