Chemistry Question Bank

Which of the following statements does NOT form a part of Bohr's model of hydrogen atom?

Find the frequency of light that corresponds to photons of energy 5.0 × 10⁻⁵ erg

For a Bohr atom, angular momentum of the electron is (n = 1, 2, 3 …)

The ratio of the energy difference between the 1st and 2nd Bohr orbits to that between the 2nd and 3rd Bohr orbits is

[NEET 2013] What is the maximum number of electrons that can be associated with the quantum numbers n=3, l=1 and m=−1?

[NEET 2013] Planck's constant h = 6.63 × 10⁻³⁴ Js. Speed of light c = 3 × 10¹⁷ nm/s. Which value is closest to the wavelength (in nm) of a quantum of light with frequency 6 × 10¹⁵ s⁻¹?

In the hydrogen spectrum, the Balmer series lies in which region?

[AIPMT 2012] Maximum number of electrons in a subshell with l = 3 and n = 4 is

Which series in the hydrogen spectrum lies in the ultraviolet region?

When electrons of a hydrogen atom return to the L shell (n=2) from higher energy shells, the series of lines formed is called

According to Bohr's theory, the angular momentum of an electron in 5th orbit is

A 4000 Å photon is used to break the I₂ molecule. The bond dissociation energy of I₂ is 246.5 kJ/mol. The % of photon energy converted to kinetic energy of iodine atoms is

[NEET 2019] In hydrogen atom, the de Broglie wavelength of an electron in the second Bohr orbit is (Bohr radius a₀ = 52.9 pm)

[NEET 2019] Orbital having 3 angular nodes and 3 total nodes is

[KCET 2012] The nitride ion in lithium nitride (Li₃N) is composed of

[NEET 2021] From the following pairs, which one is NOT an isoelectronic pair?

Bohr's theory is NOT applicable to:

[NEET 2019] 4d, 5p, 5f and 6p orbitals are arranged in order of decreasing energy. The correct option is

Suppose 10⁻¹⁷ J of light energy is needed by the interior of the human eye to see an object. The number of photons of green light (λ = 550 nm) needed to see the object are

How long would it take a radiowave of frequency 6 × 10³ s⁻¹ to travel from Mars to Earth, a distance of 8 × 10⁷ km?

[Manipal 2010] Which one of the following statements in relation to the hydrogen atom is correct?

[CBSE AIPMT 2011] The energies E₁ and E₂ of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths λ₁ and λ₂ will be

Early Indian and Greek philosophers were of the view that 'A' are the fundamental building blocks of matter. Here, 'A' refers to

When sodium compounds are heated in a Bunsen burner flame, they emit light at 5890 Å. If 1.0 × 10⁻⁴ moles of sodium atoms each emit one photon of this wavelength, how much energy (in kJ) is emitted?

As an electron moves away from the nucleus, its potential energy