1
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The de-Broglie wavelength of an electron with kinetic energy of 2.5 eV is (in m$)\left(1 \mathrm{eV}=1.6 \times 10^{-19} \mathrm{~J}\right.$, $m_e=9 \times 10^{-31} \mathrm{~kg}$ )
A
$\frac{h \times 10^{-25}}{\sqrt{72}}$
B
$\frac{h \times 10^{25}}{\sqrt{72}}$
C
$\frac{\sqrt{72}}{h \times 10^{-25}}$
D
$\frac{\sqrt{72}}{h \times 10^{25}}$
2
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ratio of ground state energy of $\mathrm{Li}^{2+}, \mathrm{He}^{+}, \mathrm{H}$ is
A
$3: 2: 1$
B
$1: 2: 3$
C
$9: 4: 1$
D
$1: 4: 9$
3
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two statements are given below.

Statement I : Nitrogen has more ionisation enthalpy and electronegativity than beryllium.

Statement II : $\mathrm{CrO}_3, \mathrm{~B}_2 \mathrm{O}_3$ are acidic oxide.

Correct answer is

A
Both Statement I and Statement II are correct.
B
Both Statement I and Statement II are not correct.
C
Statement I is correct but Statement II is not correct.
D
Statement I is not correct but Statement II is correct.
4
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The number of lone pairs of electrons on the central atom of $\mathrm{BrF}_5, \mathrm{XeO}_3, \mathrm{SO}_2$ respectively are
A
$1,1,2$
B
$1,2,2$
C
$2,2,1$
D
$1,1,1$
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