1
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Observe the following $f$-block elements

$\mathrm{Eu}(Z=63) ; \mathrm{Pu}(Z=94) ; \mathrm{Cf}(Z=98)$;

$\operatorname{Sm}(Z=62) ; \mathrm{Gd}(Z=64) ; \mathrm{Cm}(Z=96)$

How many of the above have half-filled $f$-orbitals in their ground state?

A
3
B
4
C
2
D
5
2
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The alloy formed by beryllium with ' $X$ ' is used in the preparation of high strength springs. ' $X$ ' is
A
Al
B
Zn
C
Cu
D
Cr
3
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following orders is correct for the property given?
A
$\mathrm{Cr} < \mathrm{Mn} < \mathrm{Fe}$ - standard electrode potential value for $\mathrm{M}^{3+} / \mathrm{M}^{2+}$
B
$\mathrm{Cr}^{2+} < \mathrm{Mn}^{2+} < \mathrm{Fe}^{2+}$ - magnetic moments
C
$\mathrm{VO}_{2}^{+} < \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} < \mathrm{MnO}_{4}^{-}$ - oxidising power
D
$\mathrm{Ti} < \mathrm{V} < \mathrm{Cr}$ - first ionisation enthalpy
4
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The set of elements which obey the general electronic configuration $(n-1) d^{1-10} n s^2$ is?
A
$\mathrm{Bh}, \mathrm{Eu}, \mathrm{Po}$
B
$\mathrm{Ho}, \mathrm{Er}, \mathrm{Lu}$
C
$\mathrm{Hs}, \mathrm{Hg}, \mathrm{W}$
D
$\mathrm{K}, \mathrm{Bi}, \mathrm{Ba}$
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