# Developments Leading to the Bohr’s Model of Atom MCQs with FREE PDF

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## Developments Leading to the Bohr’s Model of Atom MCQs

#### 1. If Energy = 4.5 KJ; calculate the wavelength.

a) 4.42 x 10-29 m

b) 4.42 x 10-39 m

c) 4.42 x 10-25 m

d) 4.42 x 10-22 m

Answer: 4.42 x 10-29 m

a) Required

b) Activated

c) Threshold

d) Limiting

a) 3.8 KJ

b) 5.2 KJ

c) 9 KJ

d) 1.4 KJ

a) Balmer

b) Lyman

c) Paschen

d) Brackett

a) 82357.75 cm-1

b) 105,677 cm-1

c) 82257.75 cm-1

d) 109,677 cm-1

a) True

b) False

#### 7. What’s the wavelength for the visible region in electromagnetic radiation?

a) 400 – 750 nm

b) 400 – 750 mm

c) 400 – 750 μm

d) 400 – 750 pm

Answer: 400 – 750 nm

a) 2 Hz

b) 3 Hz

c) 1 Hz

d) 4 Hz

#### 9. What is the wavenumber of violet color?

a) 25 x 103 mm-1

b) 25 x 103 m-1

c) 25 x 103 cm-1

d) 25 x 103 nm-1

Answer: 25 x 103 cm-1

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Categories: Structure of Atom