Chemistry Test 24

Result

Chemistry Test 24

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Weekly Quiz Competition

Question 1
4 / -1

What are the number of waves made by electron in an orbit of maximum magnetic quantum number +2?

A
3

B
4

C
2

D
None

Solution

If maximum magnetic quantum number is +2, then l = 2 and n = 3.

The number of waves possible are (3–1, 3–2, 2–1) = 3.
Question 2
4 / -1

Frequency of radio wave is 3 × 10⁷ Hz. The wavelength of radiation in cm is

A
140

B
1

C
10

D
1000

Solution

c = v × λ
λ = c/v = 3 × 10⁸ / 3 × 10⁷ = 10 m = 1000 cm
Question 3
4 / -1

When the azimuthal quantum number has a value of l = 0, the shape of the orbital is

A
Rectangular

B
Spherical

C
Dumbbell

D
Unsymmetrical

Solution

For s-orbital, l = 0

Therefore, the shape of the orbital is spherical.

Hence, option B is correct.
Question 4
4 / -1

The quantum number not obtained from the Schrodinger wave equation is

A
n

B
l

C
m

D
s

Solution

Schrodinger's equation is nonrelativistic. So anything involving speed of light isn't embedded in it. So photon polarization and momentum would not be quantum numbers that are contained in it.