বক্সাইড এর আণবিক সংকেত হলো -

A $Al_{2}O_{3}$

B $Al_{2}O_{3}.2H_{2}O$

C $Al_{2}O_{3}.3H_{2}O$

D $Al_{2}O_{3}.4H_{2}O$

Solution

Correct Answer: Option B

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