KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Chemistry: Questions 106 - 110 of 133

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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: 106 (1 of 3 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: 107 (2 of 3 Based on Passage) Show Passage

» Atomic Structure » Quantum Mechanics

MCQ▾

Question

K. E. Of the electron is Equation . Calculate the frequency of its wave.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 108 (3 of 3 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

Question number: 109

» Organic Compounds With Oxygen » Aldehyde and Ketones » Acidity of Hydrogen

Appeared in Year: 2015

MCQ▾

Question

The correct order of acidity of the following compound is

The compound with benzene: Choice A

The Compound With Benzene: Choice A

Showing the compounds with benzene

The compound with benzene: Choice B

The Compound With Benzene: Choice B

Showing the compounds with benzene

The compound with benzene: Choice C

The Compound With Benzene: Choice C

Showing the compounds with benzene

The compound with benzene: Choice D

The Compound With Benzene: Choice D

Showing the compounds with benzene

Choices

Choice (4) Response

a.

3 > 1 > 2

b.

1 > 2 > 3

c.

3 > 2 > 1

d.

1 > 3 > 2

Question number: 110

» Organic Compounds With Oxygen » Aldehyde and Ketones » Nature of Carbonyl Group

Appeared in Year: 2013

MCQ▾

Question

The molecule having a formyl group is

Choices

Choice (4) Response

a.

Acetone

b.

Acetaldehyde

c.

Acetic acid

d.

Acetic anhydride

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