1
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The de-Broglie wavelength of a particle of mass 1 mg moving with a velocity of $10 \mathrm{~ms}^{-1}$ is $\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}\right.$ )
A
$6.63 \times 10^{-20} \mathrm{~m}$
B
$663 \times 10^{-31} \mathrm{~m}$
C
$663 \times 10^{-34} \mathrm{~m}$
D
$663 \times 10^{-22} \mathrm{~m}$
2
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
$6, a a+\frac{1}{2}$
3
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The wavelength associated with the electron moving in the first orbit of hydrogen atom with velocity $$2.2 \times 10^6 \mathrm{~ms}^{-1}$$ (in nm) is

$$\left(m_e=9.0 \times 10^{-31} \mathrm{~kg}, h=6.6 \times 10^{-34} \mathrm{Js}\right)$$

A
0.66
B
0.33
C
0.22
D
0.44
4
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The energy required (in eV) to excite an electron of H -atom from the ground state to the third state is

A
+0.85
B
$$-$$3.4
C
12.1
D
$$-$$12.1
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