Question

Proton discovery is associated with which observation in discharge tube experiments?

Asked in RRB JE CBT 2 (CMA) · 2026
Atomic Structure · Chemistry
Exam PYQ4 Options
ChemistryStructure of AtomAtomic StructureComposition of AtomRRB JE CBT 2 (CMA)2026
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The modern periodic table arranges elements by increasing atomic number.

Correct AnswerCorrect option for this question
Option A — Canal rays contain positively charged particles identified as protons

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Questions Asked from Bohr Model of Atom: Fixed Energy Levels & Electron Transitions in Previous Exams

See how often Bohr Model of Atom: Fixed Energy Levels & Electron Transitions has appeared in previous-year questions across major government exams.

High Exam Frequency
4UPSC Questions Asked in These Years:2011, 2012, 2020, 2022
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
7Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2024, 2025, 2026
16State PSC Questions Asked in These Years:2002, 2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Bohr Model of Atom: Fixed Energy Levels & Electron Transitions has appeared in 37 previous-year exam questions, most frequently in State PSC, SSC and Railways.
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