সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
On burning charcoal which of the following gases is produced?
On burning charcoal which of the following gases is produced?
- ক. nitrous oxide
- খ. hydrogen
- গ. carbon dioxide
- ঘ. oxygen
সঠিক উত্তরঃ carbon dioxide
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