Mention the constituent of food if the end result of the test shows :
Blue green to deep red with appearance of precipitate when added to Fehling solution.

Mention the constituent of food if the end result of the test shows : Ash that does not burn after continued heating

Mention the constituent of food if the end result of the test shows : Turning blue-black after adding iodine solution.

Mention the constituent of food if the end result of the test shows : White to yellow and yellow to orange colour, after adding ammonium hydroxide.

Give reason for the following: Blue solution of copper sulphate changes to green when a piece of iron is added to the solution.

Select correct answers from the choices A, B, C, D which are given. Write down only the letter corresponding to the correct answer. A deep blue colour appears when excess of ammonium hydroxide is added to a solution containing the cation: A I 3 + ; F e 2 + ; Zn^(2+) ; Cu^(2+) ;

Identify the cation in each of the following case Ammonium hydroxide solution when added to solution D gives dirty green precipitate which changes to reddish brown after some time.

Identify the cation in each of the following case Ammonium hydroxide solution when added to the solution gives bluish white precipitate which dissolves in excess to give deep blue solution.

A solution of a metal ion when treated with KI solution gives a red precipitate which dissolves in excess of KI solution to give a colourless solution. Moreover, the solution of the same metal ion on treatment with the solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

A given oily liquid when added to water showed the following properties : The reaction occurring was exothermic and the solutions forms a white precipitate, when barium chloride solution was added. 1. Name the oily liquid .