Primary alcohol reacts with potassium dichromate as

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Primary alcohol reacts with potassium dichromate as after addition it turned colour into brown. If alcohol is secondary the reaction occur and it can be also oxidised. When reaction occurs it will lose its hydrogen and bond to the oxygen with double bond which would results in ketone. After addition of potassium dichromate secondary alcohol react and turned colour of solution into green. Tertiary alcohol loses its hydrogen as well however it can not form double bond with hydrogen so no reaction occurs in the experiment so solution remained green. Test 4 The Brady's reagent test was done with twice the volume 2 ml into 1 ml of unknown solution in test tube. In this test was bright orange and yellow precipitate formed in the test tubes C and wh E wich means the ketone and aldehyde was present. The reaction that occurred was nucleophilic addition elimination reaction. Test 5 In the test 5 I have added 2 ml of Fehling's solution into each tube with unknown solution. Adding of fehling solution caused that the Cu2+ ions gain electrons from the oxidised aldehyde. The solution was blue
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because of Cu2+ ions however when solution was reduced to Cu+ ions a red precipitate was formed. Aldehydes can be oxidised to carboxylic acids but ketones cant so the red precipitate would not be formed. Test 6 In this test I have added 1 ml of aqueous sodium carbonate to each tube containing 1 ml of each unknown solution except test tube B. The reaction occurs only in test tube D. This is because when sodium carbonate and hydrochloric acid mixed and 2 molecules of HCL gave their hydrogen atoms to the sodium carbonate. So the added sodium carbonate reacted with acid which result in production of carbon dioxide gas (bubbles were formed), water and salt.
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Infrared spectroscopy Infrared spectroscopy analyse infrared light interacting with a molecule.
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