OCR A Chemistry – 6.3.1 Functional Group Tests

Bromine water is used as a test for which functional group?

In a positive test, Br₂(aq) goes from orange to ...

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the test for haloalkanes...

• ...only requires AgNO₃(aq)

• ...always gives a white precipitate when positive

• ... is negative when no precipitate is seen

• ...requires a different solvent than water

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The test for a carbonyl involves...

• ...2,4-DNP

• ...a colour observation for a positive test

• formation of precipitate for a positive test

The positive test for a carbonyl involves a(n) ​​ (a)   precipitate

• orange
• cold
• yellow
• orange-brown

A silver mirror is formed to show a positive test for an...

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A silver mirror is formed when

• ammoniacal silver nitrate reacts in a positive test

• an oxidation of the metal has occured

• an oxidation of an organic group has occurred

• Tollen's reagent has been used in a negative test

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Secondary alcohols can be tested for...

• ...in the same way that primary alcohols can be tested

• ...with an orange to green colour change for a positive test

• ...with a green to orange colour change for a positive test

• ...in the same way that aldehydes can be tested

Write your answer in words (not formulae!)

What is used to test for secondary alcohols?

What can be used as a chemical test for carboxylic acid?