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## Saturday, July 3, 2021

### Calculate the energy per mole of photon of electromagnetic radiations of wavelength 4000Å.

### (1) On the basis of Heisenbergs uncertainty principle,
show that the electron cannot exist within the nucleus.

### (2) Atomic radius is the order of 10^-8 cm. and nuclear
radius is the order of 10^--13 cm. Calculate what fraction of atom is occupied
by nucleus

### (3) Electromagnetic radiations of wavelength 242 nm is
just sufficient to ionise sodium atom. Calculate the ionisation energy of
sodium in kJ mol^-1.

### (4) The shortest wave length in H spectrum of Lymen
series when Rh = 109678 cm^1 is

### (5) An electron beam can undergo diffraction by crystals.
Through what potential should a beam of electrons be accelerated so that its
wavelength becomes equal to 1.54 A

### (6) The mass charge ratio for A+ ion is 1.97x10^-7 kg
C^-1. Calculate the mass of A atom.

### (7) AIR service on Vividh Bharati is transmitted on 219 m
band. What is its transmission frequency in Hertz?

### (8) Calculate the number of photon emitted in 10 hours by
a 60 W sodium lamp (lemda or photon = 5893 A")

### (9) Calculate the longest wavelength which can remove the
electron from first Bohrs orbit. Given E1 = 13.6 eV .

### (10) Calculate momentum of radiations of wavelength 0.33
nm.

Chem Zipper Team

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