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MCQs

Total Questions : 622 | Page 3 of 63 pages
Question 21. Hydrogen has a number of isotopes
  1.    2
  2.    1
  3.    3
  4.    11
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 22. The mass number is the
  1.    atomic number
  2.    nucleon number
  3.    proton number
  4.    neutron number
 Discuss Question
Answer: Option B. -> nucleon number
Answer: (b).nucleon number
Question 23. Down the group the electrical conductivity
  1.    increases
  2.    decreases
  3.    same
  4.    constant
 Discuss Question
Answer: Option A. -> increases
Answer: (a).increases
Question 24. Specific radioactive isotopes are used for
  1.    leakage check
  2.    check thyroid activity
  3.    treat some types of cancer
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 25. The atom of aluminum (Al) has the number of neutrons (n⁰)
  1.    13
  2.    27
  3.    14
  4.    13
 Discuss Question
Answer: Option C. -> 14
Answer: (c).14
Question 26. Louis de Broglie suggested that electrons behaved like
  1.    clouds
  2.    winds
  3.    rains
  4.    deserts
 Discuss Question
Answer: Option A. -> clouds
Answer: (a).clouds
Question 27. Each sub-shell has at least one or two
  1.    atomic orbital's
  2.    axis
  3.    lobes
  4.    zones
 Discuss Question
Answer: Option A. -> atomic orbital's
Answer: (a).atomic orbital's
Question 28. The filling of sub-shells are dependent upon
  1.    conductivity
  2.    relative energy
  3.    density
  4.    probability
 Discuss Question
Answer: Option B. -> relative energy
Answer: (b).relative energy
Question 29. Each principal quantum shell consists of different numbers of
  1.    orbitals
  2.    magnetic field
  3.    electric field
  4.    electromagnetic field
 Discuss Question
Answer: Option A. -> orbitals
Answer: (a).orbitals
Question 30. The letters denote sub-shells are
  1.    s, p, d, f
  2.    S, P, D, F
  3.    l, m, n, p
  4.    s, p, l, m
 Discuss Question
Answer: Option A. -> s, p, d, f
Answer: (a).s, p, d, f

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