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Noble gases have completely filled valence shells and show:
AVery high reactivity
BVery low melting
CVery high density
DVery low reactivity
Answer & Solution
Correct answer: D. Very low reactivity
1. A filled valence shell is a stable arrangement.
2. Adding or removing an electron from it is difficult.
3. So the noble gases show very low chemical reactivity.
_Source: NCERT Class 11 Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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