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Q.

When t-Butanol and n-Butanol are separately treated with few drops of dil $K M n O_{4}$ , in one case only purple colour disappears and brown ppt is formed. The molecular weight of brown ppt is_____
(at wt of K is 39, Mn is 55, O is 16)

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answer is 87.

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Detailed Solution

$3 C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} O H + 2 K M n O_{4} \to 3 C H_{3} C H_{2} C H_{2} C H O + 2 M n O_{2} + 2 K O H + 2 H_{2} O$

$M n O_{2} = 55 + 32 = 87$

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When t-Butanol and n-Butanol are separately treated with few drops of dil KMnO4, in one case only purple colour disappears and brown ppt is formed. The molecular weight of brown ppt is_____(at wt of K is 39, Mn is 55, O is 16)