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কোনটি চায়না ক্লে?

K_{2} O . 3 A I_{2} O_{3} . 6 S i O_{2}

K_{2} S O_{4 .} A l_{2} (S O_{4})_{3} . 4 A l (O H)_{3}

K_{2} O . A I_{2} O_{3} . 6 S i O_{2}

A I_{2} O_{3} . 2 S i O_{2} . 2 H_{2} O

ANS : 4

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