Atomic Structure Test 5

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A test from chapter 5 i.e Atomic Structure of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. Which of the following colours has the longest wavelength in the visible spectrum of light

A) red
B) blue
C) violet
D) green

2. A spectrum containing wavelength of all wavelengths is called

A) continuous
B) discontinuous
C) line
D) atomic

3. A spectrum showing only certain colours of light is called

A) continuous
B) line
C) discontinuous
D) band

4. The wavelength range of visible spectrum is

A) 400–750 nm
B) 300–400 nm
C) 350–600 nm
D) 200–400 nm

5. The spectral lines of Lyman series (uv region) are produced when electron jumps from higher orbit to

A) 1st orbit
B) 2nd orbit
C) 3rd orbit
D) 4th orbit

6. The spectral lines of Balmer series (visible region) are produced when electron jumps from higher orbit to

A) 1st orbit
B) 2nd orbit
C) 3rd orbit
D) 4th orbit

7. The spectral lines of Paschen series (visible region) are produced when electron jumps from higher orbit to

A) 1st orbit
B) 2nd orbit
C) 3rd orbit
D) 4th orbit

8. The spectral lines of Bracket series (visible region) are produced when electron jumps from higher orbit to

A) 1st orbit
B) 2nd orbit
C) 3rd orbit
D) rth orbit

9. A dual character of matter particles in motion was postulated by

A) De-Broglie
B) Planck
C) Einstein
D) Schrodinger

10. If an electron is moving with a velocity of 2.188 x 106 m/s then its wavelength will be

A) 0.33 x 10^6 nm
B) 0.33 x 10^–2 nm
C) 0.33 nm
D) 0.22 nm