Determine the correct (T) and incorrect (F) s | vedclass

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(A) $Lu^{3+}$ $([Xe]4f^{14}5d^0)$ and $Yb^{2+}$ $([Xe]4f^{14}5d^0)$ have fully filled $4f$ orbitals,so they are diamagnetic (not paramagnetic). This s

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$(a) T, (b) F, (c) F$

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(A) $Lu^{3+}$ $([Xe]4f^{14}5d^0)$ and $Yb^{2+}$ $([Xe]4f^{14}5d^0)$ have fully filled $4f$ orbitals,so they are diamagnetic (not paramagnetic). This statement is True $(T)$.$(b)$ Mischmetal is an alloy of lanthanoids (about $95\%$) and iron (about $5\%$) with traces of $S, C, Ca,$ and $Al$. It is brittle and used primarily for making lighter flints and bullet tips,not for making sheets. This statement is False $(F)$.$(c)$ Due to its brittle nature,mischmetal cannot be used to manufacture pipes. This statement is False $(F)$.

Determine the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ $Lu^{3+}$ and $Yb^{2+}$ are not paramagnetic.
$(b)$ Sheets are made from mischmetal.
$(c)$ Pipes are made from mischmetal.

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Determine the correct $(T)$ and incorrect $(F)$ statements from the following:$(a)$ $Lu^{3+}$ and $Yb^{2+}$ are not paramagnetic.$(b)$ Sheets are made from mischmetal.$(c)$ Pipes are made from mischmetal.