Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 45

Score
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Weekly Quiz Competition

Question 1
4 / -1

Which of the following transitions will have highest emission wavelength ?

A
n = 2 to n = 1

B
n = 1 to n = 2

C
n = 2 to n = 5

D
n = 5 to n = 2

Solution
Question 2
4 / -1

When the wave of hydrogen atom comes from infinity into the first orbit then the value of wave number is

A
109700 cm^–1

B
1097 cm^–1

C
109 cm^–1

D
None of these

Solution
Question 3
4 / -1

With the increase in principal quantum number, the energy difference between the two successive energy levels

A
Increases

B
Decreases

C
Remains constant

D
Sometimes increases and sometimes decreases

Solution
Question 4
4 / -1

If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li⁺⁺ is

A
122.4 eV

B
30.6 eV

C
13.6 eV

D
3.4 eV

Solution
Question 5
4 / -1

For ionising an excited hydrogen atom, the energy required (in eV) will be

A
A little less then 13.6

B
13.6

C
More than 13.6

D
3.4 or less

Solution
Question 6
4 / -1

The colour of the second line of Balmer series is

A
Blue

B
Yellow

C
Red

D
Violet
Question 7
4 / -1

Which state of triply ionised Beryllium (Be⁺⁺⁺) has the same orbital radius as that of the ground state of hydrogen?

A
n = 4

B
n = 3

C
n = 2

D
n = 1

Solution
Question 8
4 / -1

The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is

A
16 : 1

B
18 : 1

C
4 : 1

D
2 : 1

Solution
Question 9
4 / -1

The kinetic energy of an electron revolving around a nucleus will be

A
Four times of P.E.

B
Double of P.E.

C
Equal to P.E.

D
Half of its P.E.
Question 10
4 / -1

The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is

A
–6.5 eV

B
–27.2 eV

C
13.6 eV

D
–13.6 eV

Solution