1
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An electron of stationary Hydrogen atom passes from fifth energy level to ground level. The velocity that the atom acquired as a result of photo emission is

( $\mathrm{m}=$ mass of electron, $\mathrm{R}=$ Rydberg's constant)

( $\mathrm{h}=$ Planck's constant)

A
$\frac{24 \mathrm{Rh}}{25 \mathrm{~m}}$
B
$\frac{25 \mathrm{Rh}}{24 \mathrm{~m}}$
C
$\frac{25 \mathrm{~m}}{24 \mathrm{Rh}}$
D
$\frac{24 \mathrm{~m}}{25 \mathrm{Rh}}$
2
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements about the Bohr model of the hydrogen atom is false?

A
Acceleration of electron in $\mathrm{n}=2$ orbit is less than that in $n=1$ orbit.
B
Angular momentum of electron in $\mathrm{n}=2$ orbit is more than that in $n=1$ orbit.
C
Kinetic energy of electron in $\mathrm{n}=2$ orbit is less than that in $\mathrm{n}=1$ orbit.
D
Potential energy of electron in $\mathrm{n}=2$ orbit is less than that in $n=1$ orbit.
3
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The radius of innermost orbit of hydrogen atom is $5.3 \times 10^{-11} \mathrm{~m}$. The radius of fourth allowed orbit of hydrogen atom is

A
8.48 $$\mathop A\limits^o $$
B
2.12 $$\mathop A\limits^o $$
C
4.77 $$\mathop A\limits^o $$
D
0.53 $$\mathop A\limits^o $$
4
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the third orbit of hydrogen atom the energy of an electron ' $E$ '. In the fifth orbit of helium $(Z=2)$ the energy of an electron will be

A
$\frac{25 \mathrm{E}}{36}$
B
$\frac{36 \mathrm{E}}{25}$
C
$\frac{3 \mathrm{E}}{5}$
D
$\frac{5 \mathrm{E}}{3}$
MHT CET Subjects
EXAM MAP