A substance is soluble in concentrated H_2SO_ | vedclass

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(D) The substance is soluble in concentrated $H_2SO_4$,which indicates it could be an alcohol,alkene,or ether. Since it does not decolorize bromine in

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Primary alcohol

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(D) The substance is soluble in concentrated $H_2SO_4$,which indicates it could be an alcohol,alkene,or ether. Since it does not decolorize bromine in $CCl_4$,it is not an alkene. Ethers are generally resistant to oxidation by chromic anhydride in aqueous $H_2SO_4$ (Jones reagent). Primary alcohols are oxidized very rapidly by chromic anhydride in aqueous $H_2SO_4$ (Jones oxidation),which matches the observed color change (orange $Cr^{6+}$ to green/blue $Cr^{3+}$). Therefore,the substance is a primary alcohol.

$A$ substance is soluble in concentrated $H_2SO_4$. It does not decolorize a solution of bromine in $CCl_4$. However,it is oxidized by chromic anhydride in aqueous sulfuric acid in just two seconds,changing the orange solution to blue,green,and then opaque. What does the original solution contain?

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