Atomic Structur...

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Which of the following properties of atom could be explained correctly by Thomson Model of atom?

The threshold frequency v₀ for a metal is 7.0 x 10¹⁴ s^-1. Radiation of frequency v = 1.0 x 10¹⁵ s^-1 hits the metal. Kinetic energy of the emitted electron is

Which of the following rules/principles is responsible to rule out the existence of definite paths or trajectories of electrons?

In an atom, an electron is moving with a speed of 600 ms^-1 with an accuracy of 0.005%. Certainty with which the position of the electron can be located is

[AIEEE 2009]

The wavelength (in nanometer) associated with a proton (mass = 1.67 x 10^-27 kg atom^-1) at the velocity of 1.0 x 10^-3 ms^-1 is

Statement I : It is impossible to determine position and momentum of the moving electron simultaneously with same accuracy.
Statement II : The path of an electron in an atom is clearly defined.

If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5 x 10⁷ ms^-1, then binding energy by which electron is bound to nucleus is

The position of both, an electron and a helium atom is known within 1.0 mm. Further more the momentum of the electron is known within 5.0 x 10^-26 kg ms^-1. The minimum uncertainty in the measurement of the momentum of the helium atom is

The wavelength of a neutron with a translatory kinetic energy equal to kT at 300 K is

Frequency of a matter wave is equal to

Direction : Choice the correct combination of elements and column I and coloumn II are given as option (a), (b), (c) and (d), out of which ONE option is correct.

Q. 

Neon gas is generally used in sign boards. It emits radiations at wavelength 616 nm.
Match the values derived given in Column II with the corresponding parameter given in Column I.