question_subject:
Science
question_exam:
CDS-I
stats:
0,23,12,7,4,23,1
keywords:
{'water vapour': [0, 0, 1, 2], 'milky': [0, 0, 0, 2], 'limewater': [0, 0, 0, 1], 'carbon dioxide': [2, 0, 5, 6], 'carbon monoxide': [3, 0, 1, 1], 'test tube': [2, 0, 0, 1], 'mouth': [3, 0, 2, 4], 'air': [1, 0, 0, 0], 'oxygen': [3, 0, 1, 0]}