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ৰাসায়ন বিজ্ঞান (Chemistry) MCQ

181. সংক্রমণাত্মক হেপাটাইটিছৰ কাৰণ হ'ল

A. বেক্টেৰিয়া

B. ভাইৰাছ

C. প্ৰ'টয’ৱা

D. মহ

Answer :B

Solution :

182. এমিবীয়া গ্রহণীৰ কাৰণ হ'ল

A. ভাইৰাছ

B. বেক্টেৰিয়া

C. হাইড্রা

D. প্ৰট'য’ৱা

Answer :D

Solution :

183. পানীত দ্ৰৱীভূত অক্সিজেনৰ প্ৰমাণ পৰিমাণ হ'ল

A. 2–4 ppm

B. 4–7 ppm

C. 4–6 ppm

D. 2–7 ppm

Answer :C

Solution :

184. BOD ৰ পূৰ্ণ ৰূপ হ’ল

A. Biological Oxygen density

B. Biochemical Oxygen Demand

C. Biological Oxygen Demand

D. Biochemical Oxygen density

Answer :C

Solution :

185. COD ৰ পূৰ্ণ ৰূপ হল

A. Chemical Oxygen demand

B. Chemical Oxygen density

C. Chemical Oxygen dissolved

D. Chemical Oxygenated dye

Answer :A

Solution :

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