Chemistry questions
29404 published questions with worked solutions.
- The energy of an electron in first Bohr orbit of H-atom is -13.6 eV. Which of the following energy value(s) of excited state(s)...
- For emission line of atomic hydrogen from n_i = 8 to n_f = n, the plot of wave number ( ) against (1/n^2) will be (The Rydberg...
- Limitations of Bohr's model is/are
- In hydrogen atom, the de-Broglie wavelength of an electron in the second Bohr orbit is [Given that, Bohr radius, a_0 = 52.9 pm]
- According to de-Broglie, matter should exhibit dual behavior, that is both particle and wave like properties. However, a cricket...
- Orbital having 3 angular nodes and 3 total nodes is
- Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals.
- The correct set of four quantum numbers for the valence electrons of rubidium atom (Z=37) is
- 4d, 5p, 5f and 6p-orbitals are arranged in the order of decreasing energy. The correct option is
- With the saturation of 3d orbitals, the filling of the 4p-orbitals starts at A and is completed at B. Here, A and B refer to
- The atomic numbers of elements X, Y and Z are 19, 21 and 25 respectively. The number of electrons present in the M-shell of these...
- The number of d-electrons in Fe^ 2+ (Z=26) is not equal to the number of electrons in which one of the following?
- The number of orbitals associated with quantum numbers n=5, m_s=+ 1 2 is
- Aufbau principle does not give the correct arrangement of filling up of the atomic orbitals in
- The energy associated with the first orbit in the hydrogen atom is -2.18 10^ -18 J atom^ -1 . What is the energy associated with...
- What is the maximum number of emission lines when the excited electron of a H-atom in n=6 drops to the ground state?
- The velocity of an electron placed in 3rd orbit of H atom, will be
- The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
- How many unpaired electrons are present in Ni^ 2+ cation? (At. no. =28)
- The electronic configuration with maximum exchange energy will be