The correct increasing order of basic character of Ce(OH)3, Gd(OH)3 and Nd(OH)3 is E (A) Ce(OH)3 < Nd(OH)3 < Gd(OH)3(B) Gd(OH)3 < Ce(OH)3 < Nd(OH)3 (C) Gd(OH)3 = Nd(OH)3 < Ce(OH)3(D) Ce(OH)3 < Gd(OH)3 < Nd(OH)3 C
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The correct increasing order of basic character of Ce(OH)3,Gd(OH)3andNd(OH)3 is. Due to lanthanoid contraction the size of lanthanoid ions decreases regularly with increase in atomic size. As a result of decrease in size, their covalent character between lanthanoid ion and OH- ion increases from La3+ to Lu3+.
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