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Borax is ${Na}_{2} B_{4} O_{7} . {xH}_{2} O$ . Kernite is ${Na}_{2} B_{4} O_{7} . {yH}_{2} O$ . ‘x’ and ‘y’ are respectively

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10, 7

10, 6

6, 5

10, 4

answer is D.

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Detailed Solution

$(A) {Na}_{2} B_{4} O_{7} . 10 H_{2} O (or) {Na}_{2} [B_{4} O_{5} {(OH)}_{4}] . 8 H_{2} O . . . . Borax (B) {Na}_{2} B_{4} O_{7} . 4 H_{2} O (or) {Na}_{2} [B_{4} O_{5} {(OH)}_{4}] . 2 H_{2} O . . . . . Kernite (Razorite)$

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