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Ozonolysis of Aromatics

Can oxidation...

Question

Can oxidation of alkene to formaldehyde be done using k2cr2o7

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Solution

Alkenes are oxidized by either KMnO4 or K2Cr2O7 to produce an alkane with two alcohol groups (“diols”)  Each C in the C=C bond gets an –OH group

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Q. Formaldehyde can be used for:

Q. Assertion :Oxidation of alcohol with acidified potassium dichromate can be used for identification of alcohol. Reason: During oxidation with acidified potassium dichromate orange colour of

K_{2} C r_{2} O_{7}

changes to blue.

Q. After ozonolysis of an alkene, we get mixture of

2 -

methylpropanal, glyoxal and formaldehyde. What is the alkene taken here?

Q. Which of the following can be oxidized by acidified

K_{2} {C r}_{2} O_{7}

Q. Which alkene on reductive ozonolysis gives 1 mole each of propan-2-one, formaldehyde and 2,4-dioxohexanedial?

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