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Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) Technical Abilities 2025 22.04.25 Paper-2 Shift-2 Medium +1 -0.33
Given below are two statements. Read the statements carefully and select the correct option. Statement I: Bohr’s model could account for the stability and line spectra of hydrogen atom and hydrogen like ions (for example, He⁺, Li²⁺, Be³⁺ and so on). Statement II: Bohr’s model could not explain the ability of atoms to form molecules by chemical bonds.
Correct Answer: C. Both Statements I and II are true.
Explanation: The two statements regarding Bohr’s atomic model are accurate. Statement I is correct because Bohr’s model successfully explained the stability of the hydrogen atom and provided a theoretical basis for the line spectra of hydrogen and similar single-electron ions like He+ and Li2+. Statement II is also correct because the model has significant limitations, such as its inability to explain the three-dimensional structures of atoms or how they bond to form molecules. Since both statements are factually sound, the correct option is that both Statements I and II are true.
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