Question:সোডিয়াম থায়োসালফেট-এর সংকেত কোনটি? 

A `Na_2SO_4` 
B `Na_2S_2O_3` 
C `Na_2CO_3` 
D `NaNO_3` 

+ Answer
B 

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Md. Sohel Arman

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