ল্যাবরেটরির নিরাপদ ব্যবহার-২

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ব্যুরেটের অভ্যান্তরে গ্রিজ বা তৈলাক্ত পদার্থ দূর করার জন্য কি ব্যবহার করা হয়?
মেডিঃ ২০১৬-২০১৭।

\(K_{2}Cr_{2}O_{7}\) ও গাড় \(H_{2}SO_{4}\)
গাড় \(K_{2}Cr_{2}O_{7}\) ও হালকা \(H_{2}SO_{4}\)
\(K_{2}Cr_{2}O_{7}\) ও \(H_{2}SO_{4}\)
গাড় \(K_{2}Cr_{2}O_{7}\) ও গাড় \(H_{2}SO_{4}\)
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Ans: \(K_{2}Cr_{2}O_{7}\) ও গাড় \(H_{2}SO_{4}\)
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