Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 105

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Weekly Quiz Competition

Question 1
4 / -1

The frequency of 1st line of Balmer series in H₂ atom is v₀. The frequency of line emitted by singly ionized Heatom is

A
2v₀

B
4v₀

C
v₀ /2

D
v₀ /4

Solution
Question 2
4 / -1

A
5.1 V

B
12.1 V

C
17.2 V

D
7 V

Solution
Question 3
4 / -1

The possible quantum numbers for 3d electrons are

A

B

C

D
Question 4
4 / -1

The radius of the first (lowest) orbit of the hydrogen atom is a₀. The radius of the second (next higher) orbit will be

A
4a₀

B
6a₀

C
8a₀

D
10a₀

Solution
Question 5
4 / -1

In which of the following systems will the radius of the first orbit (n = 1) be minimum?

A
Single ionized helium

B
Deuterium atom

C
Hydrogen atom

D
Doubly ionized lithium

Solution
Question 6
4 / -1

The shortest wavelength in the Lyman series of hydrogen spectrum is 912 Å corresponding to a photon energy of 13.6 eV. The shortest wavelength in theBalmer series is about

A
3648 Å

B
8208 Å

C
1228 Å

D
6566 Å

Solution
Question 7
4 / -1

A
1.5 eV

B
0.85 eV

C
3.4 eV

D
1.9 eV

Solution
Question 8
4 / -1

The Bohr model of atom

A
Assumes that the angular momentum of electrons is quantized

B
Uses Einstein's photo-electric equation

C
Predicts continuous emission spectra for atoms

D
Predicts the same emission spectra for all types of atoms

Solution
Question 9
4 / -1

Taking Rydberg\'s constant R_H = 1.097 × 10⁷ m, firstand second wavelength of Balmer series in hydrogen spectrum is

A
2000 Å, 3000 Å

B
1575 Å,2960 Å

C
6529 Å, 4280 Å

D
6552 Å, 4863 Å

Solution
Question 10
4 / -1

Which of the relation is correct between time period and number of orbits while an electron is revolving in an orbit?

A

B

C

D

Solution