1:   The number of radial nodes for 3p orbital is
Options:
  1. 4
  2. 3
  3. 1
  4. 5

Answer: Option 3

Explanation:

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2:   Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons
Options:
  1. Pauli's exclusion principle
  2. Heisenberg's uncertainty principle
  3. Hund's rule
  4. none of these

Answer: Option 2

Explanation:

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3:   Two atoms are said to be isotopes if have same -------- and different -------
Options:
  1. atomic number , atomic mass
  2. atomic mass, atomic number
  3. both the above
  4. none of these

Answer: Option 1

Explanation:

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4:   Two atoms are said to be isobars if have same -------- and different -------
Options:
  1. atomic number , atomic mass
  2. atomic mass, atomic number
  3. both the above
  4. none of these

Answer: Option 2

Explanation:

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5:   Total number of orbitals associated with third shell will be
Options:
  1. 2
  2. 5
  3. 7
  4. 9

Answer: Option 4

Explanation:

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6:   Which of the following properties of atom could be explained correctly by Thomson model of atom
Options:
  1. overall neutrality of atom
  2. spectra of hydrogen atom
  3. stability of atom
  4. all the above

Answer: Option 1

Explanation:

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7:   Orbital angular momentum depends on
Options:
  1. l
  2. n and l
  3. n and m
  4. m and s

Answer: Option 1

Explanation:

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8:   Chlorine exists in tow isotonic forms, Cl -37 and Cl-35 but its atomic mass is 35.5. This indicates the ratio of Cl-37 and Cl-35 is approximately
Options:
  1. 1:2
  2. 1:3
  3. 1:1
  4. 1:5

Answer: Option 2

Explanation:

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9:   Which of the following statements about the electron is incorrect
Options:
  1. it is a negative charged particle
  2. the mass of electron is equal to the mass of neutron
  3. it is a basic constituent of all atoms
  4. none of these

Answer: Option 2

Explanation:

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10:   Which of the following conclusions could not be derived from Rutherford's alpha particle scattering experiment
Options:
  1. most of the space i the atom is empty
  2. electrons move in a circular path of fixed energy called orbit
  3. electrons and the nucleus are held together by electrostatic forces of attraction
  4. none of these

Answer: Option 2

Explanation:

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