Q: 1 (CDS-II/2018)

Two reactants in a flask at room temperature are producing bubbles of a gas that turn limewater milky. The reactants could be
question_subject: 
Science
question_exam: 
CDS-II
stats: 
0,21,12,9,21,3,0
keywords: 
{'limewater milky': [0, 0, 0, 2], 'bubbles': [0, 0, 0, 2], 'magnesium carbonate': [0, 1, 1, 3], 'reactants': [0, 0, 0, 3], 'methane': [0, 0, 0, 5], 'flask': [0, 0, 0, 2], 'gas': [9, 1, 9, 27], 'hydrochloric acid': [1, 0, 3, 0], 'zinc': [1, 0, 0, 2], 'oxygen': [3, 0, 1, 0], 'copper': [1, 0, 1, 1], 'room temperature': [0, 0, 5, 6], 'dilute': [0, 0, 0, 4]}

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