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Question
ব্রাউন হেমাটাইটের সংকেত কোনটি-
(2Fe2O3H2o)
(Fe2O3H2o)
(2Fe2O2H2o)
(2Fe2OH2o)
ANSWER : 1
Descrption
<p>লোহার কয়েকটি আকরিক : ম্যাগেটাইট Fe<sub>3</sub>O<sub>4</sub>, রেড হিমাটাইট Fe<sub>2</sub>O<sub>3</sub>, লিমোনাইট/ব্রাউন হিমাটাইট 2Fe<sub>2</sub>O<sub>3</sub>.3H<sub>2</sub>O, সাইডেরাইট/স্প্যাথোজ FeCO<sub>3</sub></p>
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