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Question

ভূত্বকের প্রধান উপাদান কোনটি?

অক্সিজেন

নাইট্রোজেন

কার্বন ডাইঅক্সাইড

ম্যাঙ্গানিজ

ANSWER : 1

Descrption

<p class = "MsoNormal"><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">ভূত্বকের</span><span style = "font - size: 12.0pt; line - height: 115%;"> </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">প্রধান</span><span style = "font - size: 12.0pt; line - height: 115%;"> </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">প্রধান</span><span style = "font - size: 12.0pt; line - height: 115%;"> </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">উপাদান</span><span style = "font - size: 12.0pt; line - height: 115%;"> </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">হল</span><span style = "font - size: 12.0pt; line - height: 115%;">: </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">অক্সিজেন</span><span style = "font - size: 12.0pt; line - height: 115%;"> (</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৪২</span><span style = "font - size: 12.0pt; line - height: 115%;">.</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৭</span><span style = "font - size: 12.0pt; line - height: 115%;">%),  </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">সিলিকন</span><span style = "font - size: 12.0pt; line - height: 115%;"> (</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">২৭</span><span style = "font - size: 12.0pt; line - height: 115%;">.</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৭</span><span style = "font - size: 12.0pt; line - height: 115%;">%),  </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">অ্যালুমিনিয়াম</span><span style = "font - size: 12.0pt; line - height: 115%;"> (</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৮</span><span style = "font - size: 12.0pt; line - height: 115%;">.</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">১</span><span style = "font - size: 12.0pt; line - height: 115%;">%),  </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">লোহা</span><span style = "font - size: 12.0pt; line - height: 115%;"> (</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৫</span><span style = "font - size: 12.0pt; line - height: 115%;">.</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">১</span><span style = "font - size: 12.0pt; line - height: 115%;">%) </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">ক্যালসিয়াম</span><span style = "font - size: 12.0pt; line - height: 115%;"> (</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৩</span><span style = "font - size: 12.0pt; line - height: 115%;">.</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">৭</span><span style = "font - size: 12.0pt; line - height: 115%;">%) </span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Vrinda', 'sans - serif';">প্রভৃতি</span><span style = "font - size: 12.0pt; line - height: 115%; font - family: 'Mangal', 'serif';">। </span></p>

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