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ISC Class 12 Atoms and Nuclei — practice questions — page 2

Explore 51 free Atoms and Nuclei questions in ISC Class 12 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Atoms and Nuclei questions and exercises with answers

Showing questions 31–51 of 51.

Match each physical constant to its value.Read the answer and worked solution →Match each physical constant to its value.Read the answer and worked solution →NEET · Physics · Fission or FusionRead the answer and worked solution →When a nucleus $\,^{A}_{Z}\mathrm{X}$ undergoes ALPHA decay, the daughter nucleus hasRead the answer and worked solution →In BETA-MINUS ($\beta^-$) decay, the parent nucleus emits an electron AND another particle. The other particle isRead the answer and worked solution →The total binding energy of $\,^{16}_{8}\mathrm{O}$ is approximately $127.6\,\text{MeV}$. Its binding energy per nucleon is closest toRead the answer and worked solution →The unified atomic mass unit (u) is defined as exactly $1/12$ of the mass of an atom of which isotope?Read the answer and worked solution →The mass defect $\Delta m$ of a nucleus $\,^{A}_{Z}\mathrm{X}$ with mass $M$ is defined asRead the answer and worked solution →The energy equivalent of one unified atomic mass unit (1 u) is closest toRead the answer and worked solution →Order the argument: why Rutherford's atom should collapseRead the answer and worked solution →Bohr's quantisation condition for the angular momentum $L$ of an electron in the $n^\text{th}$ orbit isRead the answer and worked solution →True or false: Rutherford's two difficultiesRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the atomic models in this chapterRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →The ratio of the first excitation energy of a hydrogen atom ($E_2 - E_1$) to its ionisation energy from the ground state isRead the answer and worked solution →A radioactive sample has half-life $T_{1/2} = 5$ years. Starting with $N_0$ undecayed nuclei, the number remaining after $20$ years isRead the answer and worked solution →Complete Bohr's first postulateRead the answer and worked solution →The radius of the $n$th Bohr orbit in a hydrogen-like atom of nuclear charge $Z$ scales asRead the answer and worked solution →NEET · Physics · Bohr's Atom — Gap FillRead the answer and worked solution →The de Broglie wavelength $\lambda$ of an electron in the $n$th Bohr orbit of hydrogen, in terms of the orbit radius $r_n$, isRead the answer and worked solution →

Worked practice questions

Match each physical constant to its value.

Read exercise and reference answers
Matching pairs
  1. Left
    Speed of light (c)
    Right
    3 × 10⁸ m/s
  2. Left
    Planck constant (h)
    Right
    6.63 × 10⁻³⁴ J·s
  3. Left
    Electron charge (e)
    Right
    1.6 × 10⁻¹⁹ C
Instructions
Pair the constant with its value (SI units).
_Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_

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Match each physical constant to its value.

Read exercise and reference answers
Matching pairs
  1. Left
    Speed of light (c)
    Right
    3 × 10⁸ m/s
  2. Left
    Planck constant (h)
    Right
    6.63 × 10⁻³⁴ J·s
  3. Left
    Electron charge (e)
    Right
    1.6 × 10⁻¹⁹ C
Instructions
Pair the constant with its value (SI units).
_Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_

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NEET · Physics · Fission or Fusion

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Items
  1. Item
    Splitting of a heavy nucleus
    Answer
    left
  2. Item
    Combining of light nuclei
    Answer
    right
  3. Item
    Powers atomic reactors today
    Answer
    left
  4. Item
    Powers the Sun
    Answer
    right
  5. Item
    U-235 + neutron → Ba + Kr
    Answer
    left
  6. Item
    Deuterium + Tritium → Helium + n
    Answer
    right
Categories
Left
Nuclear Fission
Right
Nuclear Fusion
Instructions
Sort each property: nuclear fission or nuclear fusion?

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More Physics topics

Moving Charges and MagnetismCurrent ElectricityElectromagnetic Induction & Alternating CurrentSemiconductor ElectronicsRay Optics and Optical InstrumentsElectromagnetic WavesDual Nature of Radiation and MatterElectric Charges and Fields