How would you identify the position of double bond in a given unknown butene by reductive ozonolysis?

Position of double bond in alkene can be identified by

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How would you define polluted water ?

Lemieux reagent consist of an aqueous solution of sodium periodate (NaIO_(4)) and a trace of KMnO_(4) It is used for locating the position of double bond in an alkene. During the reaction, the alkene is first oxidised to cis-diol which upon cleavage with sodium peroxide gives aldehydes and ketones (similar to ozonolysis). Hot solution of acidic or alkaline KMnO_(4) can also be used for locating double bond by observing the products which are ketones or carboxylic acids. Position of triple bond can be identified by similar process. An aromatic hydrocarbon (Y) on treatment with KMnO_(4) with H^(+)//Delta square gives benzoic acid as one of the products. The hydrocarbon (Y) is :

Lemieux reagent consist of an aqueous solution of sodium periodate (NaIO_(4)) and a trace of KMnO_(4) It is used for locating the position of double bond in an alkene. During the reaction, the alkene is first oxidised to cis-diol which upon cleavage with sodium peroxide gives aldehydes and ketones (similar to ozonolysis). Hot solution of acidic or alkaline KMnO_(4) can also be used for locating double bond by observing the products which are ketones or carboxylic acids. Position of triple bond can be identified by similar process. An alkene on treatment with NaIO_(4) , KMnO_(4) "and" Na_(2)O_(2) gives acetone and acetaldehyde. The alkene is :

What is ozonolysis and how is it useful in locating the position of double bond in an alkene? How would you detect the presence of double bond in an unknown compound?

The best method for locating the position of double bond in an unknown alkene is ...............

How would you prepare ethene from ethanol

How would you convert Phenol to benzoquinone ?

How would you convert : Ethylene to ethyl bromide .