Q.
Metal hydroxides are basic in nature.Which one of the following metal hydroxide is the weakest base
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a
CeOH3
b
PrOH3
c
LaOH3
d
NdOH3
answer is D.
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Detailed Solution
Ce(Z=58) ;Pr(Z=59); Nd(Z=60) ; Sm(Z=62) ;Eu(Z=63); Gd(Z=64); Yb(Z=70) ; Lu(Z=71)Size ..............La+3>Ce+3>Pr+3>Nd+3>Sm+3>Eu+3>Gd+3>Yb+3>Lu+3 Basic strength..LaOH3>CeOH3>PrOH3>NdOH3>SmOH3>EuOH3>GdOH3>YbOH3>LuOH3
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