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Chapter No 3 :Isotopes, Isobars and Isotones (74 MCQ`S)

this chapter include mcqs on Isotopes, mcqs on Isobars and mcqs on Isotones questions & Answers for NEET, isotopes, isobars and isotones examples, Isotopes MCQs PDF, difference between isotopes, isobars and isotones, difference between isotopes and isotones with example, mcqs on Isobars, mcqs on Isotones for the preparation of public service commission exam or competitive and MDCAT Exams

  1. All the atoms of the same element are not necessarily indentical. This statement is contrary to:
    1. Bohr's Atomic theory
    2. John Dalton's atomic theory
    3. Planck's quantum theory
    4. none of these
      5. Show Answer
      Answer: B
      Explanation:
      • Isotopes have different mass number but Bohr considered all the atoms of an element alike.
  2. Isotopes of an element have different:
    1. atomic number
    2. number of electrons
    3. atomic weight
    4. position in the periodic table
      5. Show Answer
      Answer: C
      Explanation:
      • N/A
  3. Isotopes have similar:
    1. chemical properties
    2. physical properties
    3. atomic weight
    4. number of neutrons
      5. Show Answer
      Answer: A
      Explanation:
      • Isotopes have same number of electrons or electronic configuration
  4. Atoms of the same element which have the same number of protons but different number of neutrons are called:
    1. Isobars
    2. isotones
    3. isotopes
    4. none of these
      5. Show Answer
      Answer: C
      Explanation:
      • N/A
  5. Which of the following atom contains no neutron:
    1. hydrogen
    2. deuterium
    3. helium
    4. none of these
      5. Show Answer
      Answer: A
      Explanation:
      • N/A
  6. Isotopes can be identified on the basis of their;
    1. cahrge
    2. mass number
    3. charge to mass ratio
    4. none of these
      5. Show Answer
      Answer: C
      Explanation:
      • In mass spectrometer the isotopes are separated on the basis of their e/m value.
  7. The deflection of positive rays obtained from a mixture of isotopes is --------- to their masses:
    1. inversely proportional
    2. directly proportional
    3. independent of their masses
    4. none of these
      5. Show Answer
      Answer: A
      Explanation:
      • Positive rays of lighter nuclei show greater deflection
  8. The instrument which can accurately sort out the positive ions of different isotpoes of an element is:
    1. Spectrophotomerter
    2. mass spectrograph
    3. polarimeter
    4. all of these
      5. Show Answer
      Answer: B
      Explanation:
      • N/A
  9. The relative abundance of isotopes can be determined from:
    1. their current strength
    2. mass number
    3. e/m value
    4. strength of electric and magnetic field
      5. Show Answer
      Answer: A
      Explanation:
      • N/A
  10. Isotopes cannot be separated by;
    1. thermal diffusion
    2. ultracentrifuge
    3. distillation
    4. chemical method
      5. Show Answer
      Answer: D
      Explanation:
      • Since isotopes have same chemical properties.

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