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 : Ash that does not burn after continued heating

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.

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 products formed in the following (i) Zinc oxide is treated with excess of sodium hydroxide solution (ii). Iodine is added to a solution of stannous chloride.

A reddish pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. It on cooling, water is added to the residue then, it turns to its original colour. The substance is:

When compound (A) is treated with conc. H_(2)SO_(4) , a reddish brown colour gas (B) is evolved. To this solution, a solution of (C ) is added slowly from the side of the test tube, a blue ring is obtained at the junction of two layers due to formation of (D). Compound (D) has formula :

The reaction An+CuSO_4toZnSO_4 goes completely to the right. In an experiment, 10.0 g of Zn was added to 200 " mL of " CuSO_4 solution. After all the Cu was precipitated, it was found that not all the Zn had dissolved. After filtration, the total weight of the solid at the end of the reaction was 9.810 g. Calculate. (a). The weight of copper deposited and, (b). Molarity of CuSO_4 in the original solution.

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker, the potato cube increased in size, in the second beaker, the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment : Give the technical terms of the solutions used in beakers, 1 , 2 and 3 .

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker, the potato cube increased in size, in the second beaker, the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment : What is osmosis ?

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker, the potato cube increased in size, in the second beaker, the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment : How does a cell wall and a cell membrane differ in their permeability?