Chemistry Class-11: Chapter – 2. Structure of Atom – Part-3 (For CBSE, ICSE, IAS, NET, NRA 2023)
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Multiple Choice Questions
Questions 11:
Total number of orbitals associated with third shell will be ________.
(i)
(ii)
(iii)
(iv)
Answer: (iii)
Solution:
Questions 12:
Orbital angular momentum depends on ________.
(i)
(ii)
(iii)
(iv)
Answer: (i)
Solution:
Questions 13:
Chlorine exists in two isotopic forms, and but its atomic mass is . This indicates the ratio of and is approximately
(i)
(ii)
(iii)
(iv)
Answer: (iii)
Solution:
Questions 14:
The pair of ions having same electronic configuration is ________.
(i)
(ii) , Mn2 +
(iii)
(iv)
Answer: (ii)
Solution:
Questions 15:
For the electrons of oxygen atom, which of the following statements is correct?
(i) for an electron in a orbital is the same as for an electron in a orbital.
(ii) An electron in the 2s orbital has the same energy as an electron in the orbital.
(iii) for an electron in orbital is the same as for an electron in a 2s orbital.
(iv) The two electrons present in the orbital have spin quantum numbers but of opposite sign.
Answer: (iv)
Solution:
Questions 16:
If travelling at same speeds, which of the following matter waves have the shortest wavelength?
(i) Electron
(ii) Alpha particle (He2 +)
(iii) Neutron
(iv) Proton
Answer: (ii)
Solution: