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JEE Main Atoms and Nuclei — practice questions — page 2

Explore 88 free Atoms and Nuclei questions in JEE Main 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 31–60 of 88.

Complete Bohr's first postulateRead the answer and worked solution →True or false: line spectraRead the answer and worked solution →Charge and neutralityRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every problem Bohr's model was built to solveRead the answer and worked solution →Flip and pair: model with its pictureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Strength or weakness?Read the answer and worked solution →Complete the size of the nucleusRead the answer and worked solution →Reading the models backRead the answer and worked solution →Bohr's postulatesRead the answer and worked solution →Explained, or left unexplained?Read the answer and worked solution →True or false: the nucleusRead the answer and worked solution →Order the argument: why Rutherford's atom should collapseRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Assertion and reason: modelsRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Flip and pair: problem with the model that solved itRead the answer and worked solution →Which iso- term is itRead the answer and worked solution →Order the three decaysRead the answer and worked solution →Judge the assertion and the reasonRead the answer and worked solution →Type the nuclear numbersRead the answer and worked solution →Spot the false statementRead the answer and worked solution →Tap what belongs to the nucleusRead the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →Complete the size of the nucleusRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →The minimum wavelength $\lambda_{\min}$ in the continuous X-ray spectrum of an X-ray tube depends only onRead the answer and worked solution →

Worked practice questions

Complete Bohr's first postulate

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Missing parts
  1. Answer
    stable
    Choices
    1. stable
    2. elliptical
    3. random
  2. Answer
    radiant
    Choices
    1. radiant
    2. kinetic
    3. chemical
Complete the statement
In a hydrogen atom, an electron revolves in certain {0} orbits without the emission of {1} energy.
The postulate that rescues atomic stability. Source: syllabus Physics, Ch 12 Atoms.

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True or false: line spectra

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Questions
  1. Statement is true
    Yes
    Statement
    Most elements emit a characteristic spectrum.
  2. Statement is true
    Yes
    Statement
    That spectrum is a set of isolated parallel lines.
  3. Statement is true
    Yes
    Statement
    It provides useful information about atomic structure.
  4. Statement is true
    No
    Statement
    A line spectrum is a continuous band of colour.
  5. Statement is true
    Yes
    Statement
    Bohr's model was built partly to explain line spectra.
The spectrum is a set of isolated lines, and it carries information. Source: syllabus Physics, Ch 12 Atoms.

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Charge and neutrality

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Questions
  1. Question
    An atom as a whole is
    Choices
    1. positively charged
    2. negatively charged
    3. electrically neutral
    Correct choice
    electrically neutral
  2. Question
    That means it contains equal amounts of
    Choices
    1. positive and negative charge
    2. protons and neutrons
    3. mass and energy
    Correct choice
    positive and negative charge
  3. Question
    In Rutherford's model, the positive charge sits
    Choices
    1. spread through the atom
    2. in a tiny nucleus
    3. on the electrons
    Correct choice
    in a tiny nucleus
  4. Question
    Bohr's postulates apply to
    Choices
    1. every atom
    2. molecules only
    3. hydrogenic single-electron atoms
    Correct choice
    hydrogenic single-electron atoms
The atom as a whole carries no net charge. Source: syllabus Physics, Ch 12 Atoms.

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