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An Intiative by Sri Chaitanya
a
Elements of Group 7, 8, 9 form Interstitial hydrides
b
H2 can reduce Pd2+ but cannot reduce Zn+2
c
Calgon is Na2Al2Si2O8.xH2O
d
Calgon forms insoluble complexes with cations causing hardness
answer is B.
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