Chemistry · Periodicity of Elements and Periodic Properties
JEE Main 2024 — 27 January, Shift 1 — Question 64
Given below are two statements, one is labelled as Statement I and the other is labelled as Statement II.
Statement I: he and series of elements are placed separately in the periodic table to preserve the principle of classification.
Statement II : -block elements can be found in pure form in nature.
In the light of the above statements, choose the most appropriate 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:Correct
Statement I is true but Statement II is false
- Option D:
Both Statement I and Statement II are false
Answer: C
Step-by-step solution
Statement I is true: The 4f (lanthanoids) and 5f (actinoids) are placed separately at the bottom of the periodic table to preserve the principle of classification and maintain the table’s compact structure without disturbing group similarities.
Statement II is false: s-block elements (alkali and alkaline earth metals) are highly reactive and therefore do not occur in pure (free) form in nature; they are found as compounds.
Thus, statement I is true but statement II is false.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2024
- Paper
- 27 January, Shift 1
- Subject
- Chemistry
- Chapter
- Periodicity of Elements and Periodic Properties
- Topic
- Classification of Elements and Nomenclature of Superheavy Elements