Which one of the following is the colour of hydrogen gas?

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Q: 37 (NDA-I/2022)

Which one of the following is the colour of hydrogen gas?
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question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,65,21,14,4,3,65

keywords: 

{'hydrogen gas': [0, 0, 1, 2], 'colour': [11, 6, 13, 28], 'colourless': [0, 0, 0, 1], 'orange': [2, 1, 1, 4], 'black': [2, 0, 3, 3], 'light': [16, 4, 34, 62]}