Atomic Structure-De-Broglie's Relationship (KVPY Stream-SA (Class 11) Chemistry): Questions 1 - 5 of 5

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Question number: 1

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

Iodine molecule dissociates after absorbing light of 4500Å. If each molecule absorbs one quantum radiation, calculate the kinetic energy of iodine atom. (Bond energy of Equation ).

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 2

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

If the energy difference between the ground state of an atom and its excited state is Equation , what is the wavelength of the photon required producing this transition.

Choices

Choice (4) Response

a.

4.517×10 - 7m

b.

Equation

c.

Equation

d.

4.517×107m

Question number: 3

» Atomic Structure » De-Broglie's Relationship

Appeared in Year: 2014

MCQ▾

Question

If the Planck’s constant h = Equation Js, the de-Broglie wavelength of a particle having momentum of Equation kg. m. s-1 will be -

Choices

Choice (4) Response

a.

0.2 Å

b.

0.02 Å

c.

0.002 Å

d.

2 Å

Passage

Einstein had suggested that light could behave as a wave as well as like a particle i. e. it has dual character. In 1924, de-Broglie proposed that an electron, behaves both as a material particle and as a wave. This proposed a new theory wave mechanical theory of matter. According to this theory, the electrons, protons and even atom when in motion possess wave properties. According to de-Broglie, the wavelength associated with a particle of mass m, moving with velocity v is given by the relation, λ = h/mv where h is Planck’s constant.

Question number: 4 (1 of 2 Based on Passage) Show Passage

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

For particles having same kinetic energy, the de Broglie wavelength is -

Choices

Choice (4) Response

a.

Inversely proportional to its velocity

b.

Independent of velocity and mass

c.

Directly proportional to its velocity

d.

unpredictable

Question number: 5 (2 of 2 Based on Passage) Show Passage

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

Velocity of helium atom at 300K is 2.40 x 102 meter per sec. What is its wavelength, (mass number of helium is 4)?

Choices

Choice (4) Response

a.

8000 Å

b.

0.83 nm

c.

803 Å

d.

0.416 nm

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