Test: JEE Main 35 Year PYQs- Structure of Atom - JEE MCQ

The orbital angular momentum for an electron revolving in an orbit is given by  This momentum for an s-electron will be given by [2003]

Which one of the following groupings represents a collection of isoelectronic species ?(At. nos. : Cs : 55, Br : 35)[2003]

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen [2003]

Planck’s constant, h = 6.63 × 10^–34 Js

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately [2003]

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ? [2004]

Consider the ground state of Cr atom (X = 24). The number of electrons with the azimuthal quantum numbers, ℓ = 1 and 2 are, respectively [2004]

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×10⁷ m^–1) [2004]

Which one of the followin g sets of ion s represents the collection of isoelectronic species? [2004]

(Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields? [2005]
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

Of the following sets which one does NOT contain isoelectronic species? [2005] 

According to Bohr's theory, the angular momentum of an electron in 5^th orbit is [2006]

Uncertainty in the position of an electron (mass = 9.1 × 10^–31 kg) moving with a velocity 300 ms^–1, accurate upto 0.001% will be [2006]

(h = 6.63 × 10^–34 Js)

Which one of the following sets of ions represents a collection of isoelectronic species? [2006]

Which of the following sets of quantum numbers represents the highest energy of an atom? [2007]

Which one of the following constitutes a group of the isoelectronic species? [2008]

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [2008]

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 10³ ms ^–1. (Mass of proton = 1.67 × 10^–27 kg and  h = 6.63 × 10^–34 Js)

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10^–34 kg m²s^–1, mass of electron, em = 9.1 × 10^–31 kg) : [2009]

The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 10⁸ ms^–1 and NA = 6.02 × 10²³ mol^–1). [2010]

Ionisation energy of He⁺ is 19.6 × 10^–18 J atom^–1. The energy of the first stationary state (n = 1) of Li²⁺ is [2010]

A gas a bsor bs a ph oton of 355 n m an d emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:[2011]

The electrons identified by quantum numbers n and l :
(A) n = 4, l = 1
(B) n = 4, l = 0
(C) n = 3, l = 2
(D) n = 3, l = 1
can be placed in order of increasing energy as : [2012]

Energy of an electron is given by E = – 2.178 ×             

Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 ^–34 Js and c = 3.0 × 10⁸ ms^–1) [JEE M 2013]

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is: [JEE M 2014]

 Which of the following is the energy of a possible excited state of hydrogen ? [JEE M 2015]

 A stream of electrons from a heated filaments was passed two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ (where λ is wavelength associated with electron wave) is given by: [JEE M 2016]