সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
One of the following metals, which one pollutes the air of a busy city?
One of the following metals, which one pollutes the air of a busy city?
- ক. lead
- খ. copper
- গ. cadmium
- ঘ. chromium
সঠিক উত্তরঃ lead
এ সম্পর্কিত আরো প্রশ্ন দেখুন
- Which one of the following nitrogenous fertilizers is not very effective in acidic soils?
- When we breathe which of the following gases do we use?
- Choose the correct combination--
- Which one of the following forms an irreversible complex with hemoglobin of the blood?
- Farmers can keep their soil fertile by--
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Basic Information of Daily Science, Inventions and...