Chemistry · Periodicity of Elements and Periodic Properties
JEE Main 2025 — 28 January, Evening Shift — Question 38
Given below are two statements, one is labelled as Statement I and the other is labelled as Statement II.
Statement I : According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.
Statement II : Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers.
In the light of the above statements, choose the correct answer from the options given below :
- Option A:
Statement I is false but Statement II is true
- Option B:
Both Statement I and Statement II are true
- Option C:
Statement I is true but Statement II is false
- Option D:Correct
Both Statement I and Statement II are false
Answer: D
Step-by-step solution
Newlands arranged elements by increasing atomic mass, not atomic number. Thus, statement I is false.
Meyer plotted properties against atomic mass, not atomic number. Thus, statement II is also false.
Thus, both statement I and statement II are false.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2025
- Subject
- Chemistry
- Chapter
- Periodicity of Elements and Periodic Properties
- Topic
- Classification of Elements and Nomenclature of Superheavy Elements