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Objective Questions

Latest UKPSC Lecturer Chemistry Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject (Chemistry)

Question Bank UKPSC Lecturer Chemistry Exam Paper 1 - English
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Concerned Subject (Chemistry)

Question 1Single Answer
Which quantum number determines the size of an orbital?
  1. A
    Azimuthal quantum number
  2. B
    Magnetic quantum number
  3. C
    Principal quantum number
  4. D
    Spin quantum number
Question 2Single Answer
Which quantum number describes the shape of an orbital?
  1. A
    Principal quantum number
  2. B
    Azimuthal quantum number
  3. C
    Magnetic quantum number
  4. D
    Spin quantum number
Question 3Single Answer
Which quantum number gives the orientation of an orbital in space?
  1. A
    Principal quantum number
  2. B
    Azimuthal quantum number
  3. C
    Magnetic quantum number
  4. D
    Spin quantum number
Question 4Single Answer
Which quantum number has only two possible values?
  1. A
    n
  2. B
    l
  3. C
    m
  4. D
    s
Question 5Single Answer
The value of azimuthal quantum number (l) for s-orbital is?
  1. A
    0
  2. B
    1
  3. C
    2
  4. D
    3
Question 6Single Answer
How many orbitals are present in p-subshell?
  1. A
    1
  2. B
    2
  3. C
    3
  4. D
    5
Question 7Single Answer
Total number of orbitals in d-subshell is?
  1. A
    3
  2. B
    5
  3. C
    7
  4. D
    10
Question 8Single Answer
Maximum number of electrons in a shell is given by?
  1. A
    2n
  2. B
    n²
  3. C
    2n²
  4. D
    4n²
Question 9Single Answer
Which orbital has spherical shape?
  1. A
    p
  2. B
    d
  3. C
    f
  4. D
    s
Question 10Single Answer
Which rule explains pairing of electrons in orbitals?
  1. A
    Aufbau principle
  2. B
    Pauli exclusion principle
  3. C
    Hund’s rule
  4. D
    Heisenberg principle
Question 11Single Answer
Aufbau principle is based on?
  1. A
    Shape of orbitals
  2. B
    Increasing atomic number
  3. C
    Increasing energy of orbitals
  4. D
    Nuclear charge
Question 12Single Answer
Which orbital is filled after 3p according to Aufbau rule?
  1. A
    3d
  2. B
    4s
  3. C
    4p
  4. D
    5s
Question 13Single Answer
The maximum electrons in p-subshell are?
  1. A
    2
  2. B
    4
  3. C
    6
  4. D
    10
Question 14Single Answer
Which principle states that no two electrons have same set of quantum numbers?
  1. A
    Hund’s rule
  2. B
    Aufbau principle
  3. C
    Pauli exclusion principle
  4. D
    Heisenberg principle
Question 15Single Answer
Number of nodal planes in p-orbital is?
  1. A
    0
  2. B
    1
  3. C
    2
  4. D
    3
Question 16Single Answer
Which subshell has maximum penetration power?
  1. A
    f
  2. B
    d
  3. C
    p
  4. D
    s
Question 17Single Answer
Which orbital has dumbbell shape?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 18Single Answer
Which subshell has highest energy in the same shell?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 19Single Answer
Degeneracy of p-orbitals means?
  1. A
    Same shape
  2. B
    Same size
  3. C
    Same energy
  4. D
    Same orientation
Question 20Single Answer
Total number of electrons in f-subshell is?
  1. A
    10
  2. B
    12
  3. C
    14
  4. D
    16
Question 21Single Answer
The value of magnetic quantum number ranges from?
  1. A
    0 to n
  2. B
    –l to +l
  3. C
    –n to +n
  4. D
    –1 to +1
Question 22Single Answer
Which orbital has clover-leaf shape?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 23Single Answer
Which orbital has maximum number of nodal planes?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 24Single Answer
Which rule explains extra stability of half-filled orbitals?
  1. A
    Pauli principle
  2. B
    Aufbau principle
  3. C
    Hund’s rule
  4. D
    Heisenberg principle
Question 25Single Answer
The electronic configuration of Cr shows anomaly due to?
  1. A
    Nuclear charge
  2. B
    Pairing energy
  3. C
    Extra stability of half-filled orbitals
  4. D
    Screening effect
Question 26Single Answer
Which orbital is lowest in energy?
  1. A
    2p
  2. B
    3s
  3. C
    4s
  4. D
    1s
Question 27Single Answer
Which orbital has zero angular momentum?
  1. A
    p
  2. B
    d
  3. C
    f
  4. D
    s
Question 28Single Answer
Which quantum number decides energy in multi-electron atoms?
  1. A
    n only
  2. B
    l only
  3. C
    n and l
  4. D
    m only
Question 29Single Answer
The order of increasing energy is?
  1. A
    s < p < d < f
  2. B
    p < s < d < f
  3. C
    d < p < s < f
  4. D
    f < d < p < s
Question 30Single Answer
Which orbital has two nodal planes?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 31Single Answer
Maximum electrons in d-subshell are?
  1. A
    6
  2. B
    8
  3. C
    10
  4. D
    14
Question 32Single Answer
The number of orbitals in f-subshell is?
  1. A
    5
  2. B
    7
  3. C
    9
  4. D
    14
Question 33Single Answer
Which orbital penetration order is correct?
  1. A
    p > s > d > f
  2. B
    d > p > s > f
  3. C
    s > p > d > f
  4. D
    f > d > p > s
Question 34Single Answer
The shape of 3d orbitals is?
  1. A
    Spherical
  2. B
    Dumbbell
  3. C
    Clover leaf
  4. D
    Linear
Question 35Single Answer
Which orbital does not exist?
  1. A
    1s
  2. B
    2p
  3. C
    3d
  4. D
    1p
Question 36Single Answer
Which quantum number indicates spin direction?
  1. A
    n
  2. B
    l
  3. C
    m
  4. D
    s
Question 37Single Answer
Which orbital has maximum shielding effect?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 38Single Answer
The probability of finding electron is maximum at nucleus for?
  1. A
    p
  2. B
    d
  3. C
    f
  4. D
    s
Question 39Single Answer
The nodal plane passes through nucleus in which orbital?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 40Single Answer
Total orbitals in third shell are?
  1. A
    3
  2. B
    5
  3. C
    7
  4. D
    9
Question 41Single Answer
Which orbital has highest angular momentum?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 42Single Answer
Electronic configuration depends on?
  1. A
    Atomic mass
  2. B
    Atomic number
  3. C
    Neutrons
  4. D
    Isotopes
Question 43Single Answer
Which orbital is filled last in 3rd shell?
  1. A
    3s
  2. B
    3p
  3. C
    3d
  4. D
    3f
Question 44Single Answer
The value of l for f-orbital is?
  1. A
    1
  2. B
    2
  3. C
    3
  4. D
    4
Question 45Single Answer
Which orbital has four lobes?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 46Single Answer
Which orbital has no nodal plane?
  1. A
    s
  2. B
    p
  3. C
    d
  4. D
    f
Question 47Single Answer
The energy of orbital increases with increase in?
  1. A
    n
  2. B
    l
  3. C
    n + l
  4. D
    m
Question 48Single Answer
Which principle violates electron pairing in same orbital?
  1. A
    Hund’s rule
  2. B
    Pauli principle
  3. C
    Aufbau principle
  4. D
    Heisenberg principle
Question 49Single Answer
The shape of electron cloud represents?
  1. A
    Orbit
  2. B
    Path
  3. C
    Probability
  4. D
    Charge
Question 50Single Answer
Which orbital is most stable?
  1. A
    2p
  2. B
    3s
  3. C
    4s
  4. D
    1s
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