EAMCET PREVIOUS PAPER QUESTIONS FORM ATOMIC STRUCTURE PART-1
1. The wavelength of electron waves in two orbits is 3 : 5. The ratio of kinetic energy of electrons will be:
1. 25 : 9 2. 5 : 3 3. 9 : 25 4. 3 : 5
2. Electrons with a kinetic energy of 6.023×104 J/mol are evolved from a surface of a metal, when is exposed to radiation of wavelength of 600 nm. The minimum amount of energy required to remove an electron from the metal atom is
1. 2.3125×10-19 J 2. 3 × 10-19 J 3. 6.02 ×10-19 J 4. 6.62×10-34 J
1. 25 : 9 2. 5 : 3 3. 9 : 25 4. 3 : 5
2. Electrons with a kinetic energy of 6.023×104 J/mol are evolved from a surface of a metal, when is exposed to radiation of wavelength of 600 nm. The minimum amount of energy required to remove an electron from the metal atom is
1. 2.3125×10-19 J 2. 3 × 10-19 J 3. 6.02 ×10-19 J 4. 6.62×10-34 J
3. With increase in Principal Quantum number n, the energy difference between adjacent energy levels in Hydrogen atom
1) Increases 2) Decrease 3) Remains constant 4) Decrease for lower values of n and increases for higher values of n
4 Assertion (A) : The probability of finding an electron in a small volume around a point (x,y,z) at a
distance ‘r’ from the nucleus is proportional to ψ 2 .
Reason (R) :- Subatomic particles have both wave and particle nature
1) Both A and R are true and R is the correct explanation of A
2) Both A and R are true but R is not the correct explanation of A
3) A is true but R is not true 4) A is not true but R is true
5. The velocities of two particles A and B are 0.05 and 0.02 ms-1 respectively. The mass of B is five times the mass of A. The ratio of their de Broglie’s wavelength is
1) 2 : 1 2) 1 : 4 3) 1 : 1 4) 4 : 1
1) Increases 2) Decrease 3) Remains constant 4) Decrease for lower values of n and increases for higher values of n
4 Assertion (A) : The probability of finding an electron in a small volume around a point (x,y,z) at a
distance ‘r’ from the nucleus is proportional to ψ 2 .
Reason (R) :- Subatomic particles have both wave and particle nature
1) Both A and R are true and R is the correct explanation of A
2) Both A and R are true but R is not the correct explanation of A
3) A is true but R is not true 4) A is not true but R is true
5. The velocities of two particles A and B are 0.05 and 0.02 ms-1 respectively. The mass of B is five times the mass of A. The ratio of their de Broglie’s wavelength is
1) 2 : 1 2) 1 : 4 3) 1 : 1 4) 4 : 1
6. Among the first lines of lyman, balmer, paschen and brakett series in hydrogen spectra, which has higher energy?
1) Lyman
2) Balmer
3)Paschen
4) Brackett
7.How many electrons are present in M-shell of the atom of element with atomic number 24
1) 5
2)6
3) 12
4) 13
8. in C-14 isotope the numebr of neutrons would be
1) 6
2) 14
3) 8
4) 10
9. Radius of second Bohr orbit is
1) 2.12nm
2) 0.212nm
3) 0.053 nm
4) 0.0016nm
10. Neutron was discoverd by
1) rutherford
2) thomson
3) goldstein
4) chadwick
1) Lyman
2) Balmer
3)Paschen
4) Brackett
7.How many electrons are present in M-shell of the atom of element with atomic number 24
1) 5
2)6
3) 12
4) 13
8. in C-14 isotope the numebr of neutrons would be
1) 6
2) 14
3) 8
4) 10
9. Radius of second Bohr orbit is
1) 2.12nm
2) 0.212nm
3) 0.053 nm
4) 0.0016nm
10. Neutron was discoverd by
1) rutherford
2) thomson
3) goldstein
4) chadwick
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