1
TG EAPCET 2024 (Online) 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Identify the pair of species having same energy from the following. (The number given in the bracket corresponds to principal quantum number ( $n$ ) in which the electron is present.)
A
$\mathrm{H}(n=1) . \mathrm{L}^{2+}(n=1)$
B
$\mathrm{L}^{2+}(n=3), \mathrm{Be}^{3+}(n=4)$
C
$\mathrm{He}^{+}(n=1), \mathrm{Li}^{2+}(n=3)$
D
$\mathrm{H}(n=3), \mathrm{Li}^{2+}(n=3)$
2
TG EAPCET 2024 (Online) 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which one of the following corresponds to the wavelength of line spectrum of H atom in its Balmer series ? ( $R=$ Rydberg constant)
A
$\frac{9}{8 R}$
B
$\frac{100}{21 R}$
C
$\frac{25}{24 R}$
D
$\frac{16}{15 R}$
3
TG EAPCET 2024 (Online) 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Identify the pair of element in which the number of $s$-electrons to $p$-electrons ratio is $2: 3$
A
P, Mg
B
$\mathrm{P}, \mathrm{Ca}$
C
$\mathrm{O}, \mathrm{Mg}$
D
O, S
4
TG EAPCET 2024 (Online) 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following has the least electron gain enthalpy?
A
Chlorine
B
lodine
C
Oxygen
D
Sulphur
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