Structure of Atom Test

Result

Structure of Atom Test - 27

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

In the atomic spectrum of hydrogen, the spectral lines pertaining to electronic transition of n = 4 to n = 2 refers to

A
Lyman lines

B
Balmer lines

C
Paschen lines

D
Brackett lines
Question 2
4 / -1

When electronic transition occurs from higher energy state to a lower energy state with energy difference equal to ΔE electron volts, the wavelength of line emitted is approximately equal to

A

B

C

D
Question 3
4 / -1

The first line in the Balmer series in the H atom will have the frequency

A

B

C

D
Question 4
4 / -1

The orbital configuration of ₂₄Cr is 3d⁵4s¹. The number of unpaired electrons in is

A
3

B
2

C
1

D
4
Question 5
4 / -1

The maximum number of electrons in s, p and d – subshells are

A
2 in each

B
2, 4 and 6

C
2, 6 and 10

D
2, 6 and 12
Question 6
4 / -1

A
only (i) & (ii)

B
only (ii) & (iii)

C
only (ii) & (iv)

D
(ii), (iii) & (iv)
Question 7
4 / -1

A

B

C

D
none
Question 8
4 / -1

A near U.V. photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength760 nm. Hence wavelength of the second photon is

A
460 nm

B
1060nm

C
496nm

D
300nm

Solution
Question 9
4 / -1

A certain metal when irradiated to light ( = 3.2 × 10¹⁶ Hz) emits photoelectrons with twice kinetic energy as did photo electrons when the same metal is irradiated by light ( = 2.0 × 10¹⁶ Hz). The of metal

A

B

C

D
Question 10
4 / -1

The ratio of the radil of the first three Bohr orbit in H atom is

A

B
1 : 2 : 3

C
1 : 4 : 9

D
1 : 8 : 27

Solution