1:   The species which is not paramagnetic among the following is
Options:
  1. Cl-
  2. Be-
  3. Ne2+
  4. As+

Answer: Option 1

Explanation:

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2:   For principal quantum number n=4, the total number of orbital having l=3 is
Options:
  1. 5
  2. 6
  3. 4
  4. 7

Answer: Option 4

Explanation:

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3:   The energy of second Bohr orbit of hydrogen atom is 328 KJ/mol. Hence the energy of fourth orbit would be
Options:
  1. -41 KJ/mol
  2. -82 KJ/mol
  3. -1312 KJ/mol
  4. none of these

Answer: Option 2

Explanation:

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4:   Azimuthal quantum number defines
Options:
  1. e/m ratio of electron
  2. spin of electron
  3. angular momentum of electron
  4. none of these

Answer: Option 3

Explanation:

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5:   What is the maximum number of electrons in an atom that can have the quantum numbers , n=4 and m1=+1
Options:
  1. 4
  2. 3
  3. 6
  4. 2

Answer: Option 3

Explanation:

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6:   The total number of orbitals in a shell having principal quantum n is
Options:
  1. 2n
  2. n2
  3. 2n2
  4. none of these

Answer: Option 2

Explanation:

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7:   The orientation of an atomic orbital is governed by
Options:
  1. principal quantum number
  2. azimuthal quantum number
  3. Spin quantum number
  4. Magnetic quantum number

Answer: Option 3

Explanation:

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8:   Isoelectronic species are
Options:
  1. f-, O2-
  2. f-, O
  3. F-, O+
  4. F-, O2+

Answer: Option 1

Explanation:

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9:   The following quantum numbers are possible for how many orbitals n=3, l=2, m=+2
Options:
  1. 1
  2. 2
  3. 3
  4. 4

Answer: Option 2

Explanation:

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10:   The electronic configuration of Cu2+ ion is
Options:
  1. [Ar] 4s1 3d8
  2. [Ar] 4s2 3d104p1
  3. [Ar] 4s13d10
  4. none of these

Answer: Option 2

Explanation:

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