26
MCQ (Multiple Correct Answer)
General electronic configuration of actinoids is $(n-2) \mathrm{f}^{1-14}(\mathrm{n}-1) \mathrm{d}^{0-2} \mathrm{~ns}^2$. Which of the following actinoids have one electron in 6d orbital?
A
U (Atomic number. 92)
B
Np (Atomic number. 93)
C
Pu (Atomic number. 94)
D
Am (Atomic number. 95)
27
MCQ (Multiple Correct Answer)
Which of the following lanthanoids show +2 oxidation state besides the characteristic oxidation state +3 of lanthanoids?
A
Ce
B
Eu
C
Yb
D
Ho
28
MCQ (Multiple Correct Answer)
Which of the following ions show higher spin only magnetic moment value?
A
$\mathrm{Ti}^{3+}$
B
$\mathrm{Mn}^{2+}$
C
$\mathrm{Fe}^{2+}$
D
$\mathrm{Co}^{3+}$
29
MCQ (Multiple Correct Answer)
Transition elements form binary compounds with halogens. Which of the following elements will form $\mathrm{MF}_3$ type compounds?
A
Cr
B
Co
C
Cu
D
Ni
30
MCQ (Multiple Correct Answer)
Which of the following will not act as oxidising agents?
A
$\mathrm{CrO}_3$
B
$\mathrm{MoO}_3$
C
$\mathrm{WO}_3$
D
$\mathrm{CrO}_4^{2-}$