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A salt having $B O_{3}^{3 -}$ on burning with alcohol and conc. $H_{2} S O_{4}$ gives which color edge flame.

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White

Yellow

Red

Green

answer is D.

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Detailed Solution

$2 N a_{3} B O_{3} + 3 H_{2} S O_{4} \to 3 N a_{2} S O_{4} + 2 H_{3} B O_{3} H_{3} B O_{3} + 3 C_{2} H_{5} O H \to {(C_{2} H_{5})}_{3} B O_{3}$ Burns with Green edge flame

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