Entry Test MCQ :: Atomic Spectra

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11.

Ground state energy of the 4th orbit in a H-atom is

A.	?13.60 eV	B.	?3.40 eV
C.	?0.85 eV	D.	?1.51 eV

12.

Total number of series in hydrogen spectrum is

A.	three	B.	four
C.	five	D.	six

13.

The radiations emitted form hydrogen filled discharge tube show

A.	band spectrum	B.	line spectrum
C.	continuous spectrum	D.	absorption spectrum

14.

The electric P.E of an electron in an orbit at a distance rn from the positive charge

A.	Ke2/rn	B.	Ke2/rn2
C.	?Ke2/rn	D.	?Ke2/rn2

15.

Radiation with wavelength longer than red lights

A.	ultraviolet rays	B.	X-rays
C.	infra red radiation	D.	visible radiation

16.

Bracket series is obtained when all transition of electron terminate on

A.	4th orbit	B.	5th orbit
C.	3rd orbit	D.	2nd orbit

17.

In an electronic transition atom cannot emit

A.	?-rays	B.	infra red radiation
C.	visible light	D.	ultraviolet rays

18.

Reverse process of photoelectric effect is

A.	pair production	B.	Compton effect
C.	annihilation of matter	D.	X-rays production

19.

X-rays are similar in nature to

A.	cathode rays	B.	positive rays
C.	?-rays	D.	?-rays

20.

The penetrating power of X-rays depends on their

A.	applied voltage	B.	frequency
C.	source	D.	all of the above