In which of the following systems will the wavelength corresponding to \(n=2\) to \(n=1\) be minimum?
1. | hydrogen atom |
2. | deuterium atom |
3. | singly ionized helium |
4. | doubly ionized lithium |
Which of the following transitions will the wavelength be minimum?
1. | \(n=5\) to \(n=4\) |
2. | \(n=4\) to \(n=3\) |
3. | \(n=3\) to \(n=2\) |
4. | \(n=2\) to \(n=1\) |
The minimum orbital angular momentum of the electron in a hydrogen atom is:
1. \(h\)
2. \(h/2\)
3. \(h/2\pi\)
4. \(h/ \lambda\)
1. | \(2\) possible energy values. |
2. | \(3\) possible energy values. |
3. | \(4\) possible energy values. |
4. | \(5\) possible energy values. |
Taking the bohr radius as \(a_0=53\) pm, the radius of Li++ ion in its ground state on the basis of bohr's model will be about:
1. \(153\) pm
2. \(27\) pm
3. \(18\) pm
4. \(13\) pm
Let \(L_1\) and \(L_2\) be the orbital angular momentum of an electron in the first and second excited states of the hydrogen atom, respectively. According to Bohr's model, the ratio \(L_1:L_2\) is:
1. \(1:2\)
2. \(2:1\)
3. \(3:2\)
4. \(2:3\)
Statement I: | \(n^\text{th}\) Bohr orbit in an atom is directly proportional to \(n^3.\) | The time period of revolution of an electron in its
Statement II: | \(n^\text{th}\) Bohr orbit in an atom is directly proportional to \(n.\) | The K.E of an electron in its
1. | Statement I is incorrect and Statement II is correct. |
2. | Both Statement I and Statement II are correct. |
3. | Both Statement I and Statement II are incorrect. |
4. | Statement I is correct and Statement II is incorrect. |