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Question
The atoms of which of the following pair of elements are most likely to exist in free state ?
(a) hydrogen and helium
(b) argon and carbon
(c) neon and nitrogen
(d) helium and neon
(a) hydrogen and helium
(b) argon and carbon
(c) neon and nitrogen
(d) helium and neon
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Solution
(d) helium and neon
Atoms of helium and neon exist in a free state because they are inert gases and chemically inactive.
Atoms of helium and neon exist in a free state because they are inert gases and chemically inactive.
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