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Question
A rare gas that was detected in the sun before its discovery on earth is :
A rare gas that was detected in the sun before its discovery on earth is :
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Solution
The correct option is B He
Of all the noble gases, first came the discovery of helium, which is unique in being the first element to be discovered extra-terrestrially before being found on the earth.
Of all the noble gases, first came the discovery of helium, which is unique in being the first element to be discovered extra-terrestrially before being found on the earth.
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