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Q72 (CGS/2026) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Consider the following statements in respect of noble gases :
I. They are p-block elements.
II. They are highly active.
III. They have completely filled electronic configurations.
Which of the statements given above is/are correct?

Result
Your answer: —  Â·  Correct: B

Explanation

Noble gases (Group 18) include Helium, Neon, Argon, Krypton, Xenon, and Radon. Statement I is correct because, in the modern periodic table, these elements (except Helium) are classified as p-block elements as their valence electrons occupy the p-orbitals. Statement III is correct as they possess completely filled electronic configurations (ns2 np6 for most, and 1s2 for Helium), which represents a stable octet or duplet. Statement II is incorrect because this stable configuration makes them chemically inert or very low in reactivity under standard conditions; they are not "highly active." Consequently, only statements I and III are correct.

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