alleryWhich element was discovered by Pierre Janssen while observing the 1868 eclipse from Guntur?
AHelium
BNeon
CArgon
DHydrogen
Answer & Solution
Correct answer: A. Helium
1. Janssen observed the solar eclipse of 18 August 1868 from Guntur.
2. He discovered helium from there.
3. Neon and argon were found later, and hydrogen was known long before.
_Source: Wikipedia, History of science and technology on the Indian subcontinent, Colonial era_
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