1
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Correct set of four quantum numbers for the valence electron of strontium $(z=38)$ is
A
$5.0 .0+\frac{1}{2}$
B
$51, a+\frac{1}{2}$
C
$5.11+\frac{1}{2}$
D
$6, a a+\frac{1}{2}$
2
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Match of following.
List I
(Element)
List II
(Electron gain enthalpy (in $\mathrm{kJ} \mathrm{mol}^{-1}$ )
A F I -141
B Cl II -328
C O III -200
D S IV -349
The correct answer is
A
A - II, B $-N, C-1, D-$ III
B
$A=N, B-N, C-I, D-B$
C
$A-$ III, $B-I I, C=I N, D-1$
D
A - I, B - ill, C - N, D - 1
3
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The bond lengths of diatomic molecules of elements $X$, $Y$ and $Z$ respectively are 143, 110 and 121 pm . The atomic numbers of $X, Y$, and $Z$ respectively are
A
$9,7,8$
B
$7,8,9$
C
$9,8,7$
D
$7,9,8$
4
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The correct formula used to determine the formal charge (Q) on an atom in the given Lewis structure of a molecule or ion is ( $V=$ number of valence electrons in free atom, $U=$ number of unshared electrons on the atom, $B=$ number of bonds around the atom)
A
$Q_1=V-\left(\frac{U}{B}\right)$
B
$Q_i=V+(U-B)$
C
$O_r=V-(\nu+B)$
D
$Q,=V-\left(\frac{B}{U}\right)$
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