engineering recuitment GPSC Engineering Services Civil Previous Year Papers General Science Chemistry Organic Chemistry

हिरवी फळे कृत्रिमरीत्या पिकवण्यासाठी खालीलपैकी कोणता वायू वापरला जातो?

1
कार्बन डायऑक्साइड
2
इथेन
3
हायड्रोजन
4
ऍसिटिलीन (इथिलीन)
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