1.

Na_2 B_4 O_7.10 H_2 O can also be represented as

Answer»

`Na_2 [B_4 O_5 (OH)_4 ]. 8 H_2 O `
`2NaBO_2 .__B_2 O_3 . 10 H_2 O `
`Na_2 [B_4 (H_2 O)_4 . O_7 ] . 6 H_2 O `
All the above

Answer :A


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