RE-NEET Chemistry Structure of Atom Class 11 Questions
7 questions
In Geiger-Marsden experiment, the number of scattered α-particles N(θ) is plotted as a function of scattering angle θ. Which of the following options represents the correct plot?
Consider that an electron is revolving in an excited state of Hydrogen atom with velocity √25.6 ×10⁵ ms⁻¹. The radius of the orbit is x×10⁻⁹ m. The value of x is: [Take the mass of electron to be 9×10⁻³¹ kg, charge of electron = −1.6×10⁻¹⁹ C and 1/4πε₀ = 9×10⁹ N m² C⁻²]
Consider the following schematic plots of orbital wavefunction (ψr) against distance (r) from the nucleus. The figure representing two radial nodes in the orbital is
The spectral series which corresponds to the electronic transition from the levels n₂ = 5, 6,... to the level n₁ = 4 is
Some energy levels of a molecule are shown in the figure with their wavelengths of transitions. Then:
The quantum numbers of four electrons are given below:
I. n = 4; l = 2; m₁ = -2; s = -½ II. n = 3; l = 2; m₁ = 1; s = +½ III. n = 4; l = 1; m₁ = 0; s = +½ IV. n = 3; l = 1; m₁ = -1; s = +½
The correct decreasing order of energy of these electrons is
Given below are two statements:
Statement I: The Balmer spectral line for H atom with lowest energy is located at . (R_H = Rydberg constant)
Statement II: When the temperature of blackbody increases, the maxima of the curve (intensity of wavelength) shifts to shorter wavelength.
In the light of the above statements, choose the correct answer from the options given below: