Which is the odd one hydrogen air helium carbon
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air
all other(H,He,C) are elements whereas air is a mixture of many gases
all other(H,He,C) are elements whereas air is a mixture of many gases
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In above mentioned, carbon is not suitable for pairing.
As hydrogen, helium, and air are available in the form of gases whereas carbon is found in solid form.
Amongst the pair, carbon is only one that can be solid in physical state at room temperature. Beca
use of this , it cannot be paired with rest three.
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