Atomic Structure (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Chemistry): Questions 18 - 22 of 30

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Question number: 18

» Atomic Structure » Heisenberg Uncertainty Principle

Assertion-Reason▾

Assertion (Ꭺ)

If an electron is located within the range of 0.1 Å then the uncertainty in velocity is approximately.

Reason (Ꭱ)

Trajectory (path of motion) of above electron can defined,

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

Question number: 19

» Atomic Structure » Electronic Configuration of Elements

Appeared in Year: 2015

MCQ▾

Question

The element, which readily forms an ionic bond, has the electronic configuration

Choices

Choice (4) Response

a.

122

b.

122

c.

122

d.

122 3

Question number: 20

» Atomic Structure » Bohr Model of Hydrogen Atom

MCQ▾

Question

Find out the number of waves made by a Bohr electron in one complete revolution in its third orbit.

Choices

Choice (4) Response

a.

λ

b.

2 λ

c.

λ

d.

3 λ

Question number: 21

» Atomic Structure » Bohr Model of Hydrogen Atom

Appeared in Year: 2014

MCQ▾

Question

The radii of the first Bohr orbit of O (), () and () are in the order

Choices

Choice (4) Response

a.

> >

b.

< <

c.

> >

d.

< <

Question number: 22

» Atomic Structure » Thomson and Rutherford Atomic Models

MCQ▾

Question

Who discovered electron and neutron?

Choices

Choice (4) Response

a.

Chadwick and J. J. Thomson

b.

E. Goldstein and J. J. Thomson

c.

J. J. Thomson and Chadwick

d.

J. J. Thomson and E. Goldstein

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