Structure of Atom Test

Result

Structure of Atom Test - 39

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Weekly Quiz Competition

Question 1
4 / -1

The velocities of two particles A and B are 0.05 and 0.02 ms^-1 respectively. The mass of B is five times the mass of A. The ratio of their de-Broglie's wavelength is

A
2 : 1

B
1 : 4

C
1 : 1

D
4 : 1

Solution
Question 2
4 / -1

Which of the following expressions gives the de-Broglie relationship

A

B

C

D

Solution
Question 3
4 / -1

The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately
(Planck's constant, h = 6.63 × 10^-34 Js )

A
10^-33 m

B
10^-31 m

C
10^-16 m

D
10^-25 m

Solution
Question 4
4 / -1

A body of mass 10 mg is moving with a velocity of 100 ms^-1. The wavelength of de-Broglie wave associated with it would be (h = 6.63 × 10^-34 Js)

A
6.63 × 10^-35 m

B
6.63 × 10^-34 m

C
6.63 × 10^-31 m

D
6.63 × 10^-37 m

Solution
Question 5
4 / -1

The probability of finding the electron in the orbital is

A
100%

B
90-95%

C
70-80%

D
50-60%
Question 6
4 / -1

Wave nature of electrons was demonstrated by

A
Schrodinger

B
de-Broglie

C
Davisson and Garmer

D
Heisenberg

Solution
Question 7
4 / -1

A
2

B
0.25

C
4

D
1

Solution
Question 8
4 / -1

An electron is moving in Bohr's fourth orbit. Its de-Broglie wavelength is λ. What is the circumference of the fourth orbit?

A

B
2λ

C
4λ

D

Solution
Question 9
4 / -1

Which of the following is Heisenberg uncertainty principle ?

A

B

C

D

Solution
Question 10
4 / -1

Uncertainty in position of a particle of 25 g in space is 10^-5 m. Hence, uncertainty in velocity (ms^-1) is
(Planck's constant h = 6.6 × 10^-34 Js)

A
2.1 × 10^-28

B
2.1 × 10^-34

C
0.5 × 10^-34

D
5.0 × 10^-24

Solution