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NEET Chemistry : Structure of Atom

Multiple Choice Questions

31.

The ratio of the difference in energy between the first and the second Bohr orbit to that between the second and the third Bohr orbit is

$\frac{1}{2}$
$\frac{1}{3}$
$\frac{4}{9}$
$\frac{27}{5}$

32.

Match the particle with its characteristic

Column I	Column II
A. $α$ -particle	p. Slow moving
B. Isobar	q. High penetration power
C. $γ$ - ray	r. Same atomic mass
D. $β$ - particle	s. consists of electron

A - p; B - r; C - q; D - s
A - p; B - q; C - r; D - s
A - r; B - s; C - p; D - q
A - s; B - r; C - p; D - q

33.

The Vividh Bharti Station of All India Radio, Delhi, broadcasts on a frequency of 1,368 kHz (Kilohertz). Calculate the wavelength ( $λ$ ) of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong to?

319.4 m and X-rays
319.4 m and radiowave
219.3 m and microwave
219.3 m and radiowave

34.

What will be the number of waves formed by a Bohr electron in one complete revolution in its second orbit?

Three
Two
One
Zero

35.

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

$\frac{2}{λ}$
2 $λ$
4 $λ$
$\frac{4}{λ}$

36.

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainty with which the position of the electron can be located is

(Given, h= 6.6 x 10^-34 kg m² s^-1, mass of electron e_m = 9.1 x 10^-31 kg)

215 x 10^-3 m
2.78 x 10^-3 m
1.92 x 10^-3 m
3.24 x 10^-3 m

37.

If n = 6, the correct sequence for filling of electrons will be

ns $\to$ (n - 1)d $\to$ (n - 2)f $\to$ np
ns $\to$ (n - 2)f $\to$ np $\to$ (n - 1)d
ns $\to$ np $\to$ (n - 1)d $\to$ (n - 2)f
ns $\to$ (n - 2)f $\to$ (n - 1)d $\to$ np

38.

Which one of the following sets of quantum numbers represents the highest energy level in an atom?

n = 4; l = 0; m = 0; s = + $\frac{1}{2}$
n = 3; l = 1; m = 1; s = + $\frac{1}{2}$
n = 3; l = 2; m = -2; s = + $\frac{1}{2}$
n = 3; l = 0; m = 0; s = + $\frac{1}{2}$

39.

Highest energy will be absorbed to eject out the electron in the configuration.

1s²2s²2p¹
1s²2s²2p³
1s²2s²2p²
1s²2s²2p⁴

40.

Maximum number of electrons in a subshell of an atom determined by the following?

4l + 2
2n²
4l - 2
2l + 1

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NEET Chemistry : Structure of Atom

Multiple Choice Questions