1:   In hydrogen spectrum, spectral lines of Lyman series are present in region of
Options:
  1. UV
  2. IR
  3. visible
  4. none of these

Answer: Option 1

Explanation:

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2:   In a sodium ion, number of electrons will be
Options:
  1. 10
  2. 11
  3. 12
  4. 9

Answer: Option 1

Explanation:

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3:   If travelling at same speed, which of the following natter waves have the shortest wavelength
Options:
  1. electron
  2. proton
  3. neutron
  4. alpha particles

Answer: Option 4

Explanation:

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4:   Number of angular nodes for 4d orbital is
Options:
  1. 4
  2. 3
  3. 2
  4. 1

Answer: Option 3

Explanation:

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5:   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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6:   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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7:   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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8:   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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9:   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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10:   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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A great hope fellYou heard no noiseThe ruin was within.
-Emily Dickinson