Retro (Past 13 Years) JEE Main (Structure Of Atom) - JEE MCQ

A gas absorbs photon of 355 nm and emits at two wavelengths. If one of the emission is at 680 nm, the other is at

(AIEEE 2010)

The frequency of light emitted for the transition n = 4 to n = 2 of He⁺ is equal to the transition in H atom corresponding to which of the following?

(AIEEE 2011)

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

Ionisation energy of He⁺ is19.6x10^-18 J atom^-1. The energy of the first stationary state (n = 1) of . . 0 . .
Li²⁺ is 

(AIEEE 2010)

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 x 10^-34 kg m² s^-1, mass of electron, e_m = 9.1 x 10^-31 kg)

(AIEEE 2009)

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 x 10³ ms^-1 (Mass of proton = 1.67x 10^-27 kg and 0 = 6.63 x 10^-34 Js

(AIEEE 2009)

The ionisation enthalpy of hydrogen atom is 1.312x 10⁶ J mol^-1.The energy required to excite the electron in the atom from n₁ = 1 to n = 2 is

(AIEEE 2008)

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

Which of the following nuclear reactions will generate an isotope?

(AIEEE 2007)

Uncertainty in the position of an electron (mass 9.1 x 10^-31 kg) moving with a velocity of 300 ms^-1, accurate upto 0.001% will be:

(AIEEE 2006) 

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

(AIEEE 2006)

Which of the following statements in relation to the hydrogen atom is correct? 

(AIEEE 2005)

In a multielectron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

(AIEEE 2005)

Of the following sets, which one does not contain isoelectronic species?

(AIEEE 2005)

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 X 107 m^-1)

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

(AIEEE 2004)

Consider the ground state of Cr atom (Z = 24).

The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively

(AIEEE 2004)

Which one of the following sets of ions represents the collection of isoelectronic species?

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

The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approxim ately

(Planck’s constant, h = 6.63 x 10^-34 Js) 

(AIEEE 2003)

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

(AIEEE2003)

The number of d-electrons retained in Fe²⁺ (atomic number Fe = 26) ion is

(AIEEE 2003)

Which one of the following groupings represents a collection of isoelectronic species?

(Atomic numbers of Cs = 55, Br = 35)

(AIEEE 2003) 

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

(AIEEE 2003)

Uncertainty in position of a particle of 25 g in space is 10^-5 m. Hence, uncertainty in velocity (ms^-1) is

(Planck’s constant, h = 6 . 6 x 10^-34 Js)

(AIEEE 2002)

Energy of H-atom in the ground state is -13.6 eV hence energy in the second excited state is

(AIEEE 2002)