Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is a fusion reaction?

A
₁H² + ₁H² → ₂He⁴

B
₁H² + ₁H² → 2(₁H²)

C
₁H¹ + ₁H¹ → ₂He⁴

D
₁H¹ + ₁H² → ₂He⁴ + n

Solution
Question 2
4 / -1

The fussion process is possible at high temperatures, because at higher temperatures

A
the nucleus disintegrates

B
the molecules disintegrates

C
atoms become ionised

D
the nucleus get sufficient energy to overcome the strong forces of repulsion
Question 3
4 / -1

For maintaining sustained chain reaction, the following is

A
protons

B
electrons

C
neutrons

D
positions
Question 4
4 / -1

Atomic reactor is based on

A
controlled chain reaction

B
uncontrolled chain reaction

C
nuclear fission

D
nuclear fussion
Question 5
4 / -1

Solid CO₂ forms

A
Ionic bonds

B
Vander Waal bonds

C
Chemical bonds

D
Covalent bonds
Question 6
4 / -1

What is the radius of Iodine atom? (At. no. 53, mass no. 126)

A
2.5 × 10^–11 m

B
2.5 × 10^–9 m

C
7 × 10^–9 m

D
7 × 10^–6 m

Solution
Question 7
4 / -1

Hydrogen atom emits blue light when it changes from n = 4 energy level to the n = 2 level. Which color of light would from the n = 5 level to the n = 2 level.

A
Red

B
Yellow

C
Green

D
Violet
Question 8
4 / -1

In H spectrum, the wavelength of Hα line is 656 nm whereas in a distant galaxy, the wavelength of H_α line is 706 nm. Estimate the speed of galaxy with respect to earth.

A
2 × 10⁸ m/s

B
2 × 10⁷ m/s

C
2 × 10⁶ m/s

D
2 × 10⁵ m/s

Solution
Question 9
4 / -1

If the electron in a hydrogen atom jumps from an orbit with level n₁ = 3 to an orbit with level n₁ = 2, the emitted radiation has a wavelength given by

A

B

C

D

Solution
Question 10
4 / -1

If the wavelength of the first line of the Balmer series of hydrogen is 6561Å, the wavelength of the second line of the series should be

A
13122 Å

B
3280 Å

C
4860 Å

D
2187 Å

Solution