Structure of Atom Test

Result

Structure of Atom Test - 28

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Weekly Quiz Competition

Question 1
4 / -1

If threshold wavelength for ejection of electron from metal is 300nm, then work function for photoelectric emission is

A

B

C

D

Solution
Question 2
4 / -1

The mass of one mole of electron is

A

B
0.55mg

C

D
1.008mg
Question 3
4 / -1

For the electronic transition from n = 2 to n = 1 which one of the following will produce shortest wave length?

A
H atom

B
D atom

C
He⁺ ion

D
Li²⁺ion
Question 4
4 / -1

For a certain particle, it is found that uncertainty 1840 in velocity is reciprocal of uncertainty in position This implies that

A
Mass of the particle is > unity

B
Mass of the particle is unity

C
Mass of the particle ≤ h

D
Mass of the particle ≥ h / 4π
Question 5
4 / -1

For particles having same KE., the de-broglie wavelength is

A
Directly proportional to its velocity,

B
Inversely proportional to its velocity

C
Independent of its mass and velocity

D
Unpredictable
Question 6
4 / -1

Which of the expression given below gives IE of H atoms in terms of Rydberg’s constant (R_H)?

A
R_H.hc

B
R_H.N_A.hc

C
R_H(2hc)

D
R_H.c
Question 7
4 / -1

If numerical value of mass and velocity are equal then de-Broglie wave length in terms of K.E. is

A

B

C
both correct

D
none
Question 8
4 / -1

If uncertainty in position and velocity are equal then uncertainty in momentum will be

A

B

C

D
Question 9
4 / -1

How fast an electron is moving if it has a wavelength equal to the distance it travel in one second?

A

B

C

D
Question 10
4 / -1

If uncertainties in the measurement of position and momentum are equal, the uncertainty in the measurement of velocity is

A

B

C

D
none of these