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

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 133 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 150.00 or

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 I2=240×103kJmol ).

Choices

Choice (4) Response

a.

9.67×1019J

b.

2.16×1020J

c.

2.84×1019J

d.

3.68×1024J

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 4.4×1019J , what is the wavelength of the photon required producing this transition.

Choices

Choice (4) Response

a.

4.517×10 - 7m

b.

8.9×107m

c.

8.9×107m

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 = 6.6×1034 Js, the de-Broglie wavelength of a particle having momentum of 3.3×1024 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

Sign In