You have 5 test tubes each filled with a different pure compound. You also have

Question

You have 5 test tubes each filled with a different pure compound. You also have a lot of extra test tubes and any other reagents needed to identify each compound. One contains benzene, one contains benzaldehyde, one contains cyclohexene, one contains benzoic acid, and one contains benzyl alcohol. Use "simple chemical tests" to distinguish which test tube has which compound. You do not need to write all of the equations - just write the one that gives the positive result allowing you to know what is in the test tube. You will assign the test to each test tube. In other words, not all of you will have the same substance in the same test tube but you must have the correct reactions to prove the identity. Test tube 1 contains _____ because Test tube 2 contains _____ because Test tube 3 contains _____ because Test tube 4 contains _____ because Test tube 5 contains _____ because

Explanation / Answer

8. Test tube 1 contain benzaldehyde because it forms silver mirror with tollen reagent.

C6H5CHO + Ag+=C6H5COO- + Ag

Test tube 2 contain benzoic acid because it gives effervescence on adding sodium bicarbonate solution as CO2 would be released.

Test tube 3 contain cyclohexene as it decolorise bromine water.

Test tube 4 contain benzyl alcohol because it release Dihydrogen gas on adding Na.

Test tube 5 contain benzene because it have a characteristic smell.

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