In the experiment to demonstrate that starch is made as food by the process of photosynthesis, the plucked leaf is first boiled in water for about 3 to 5 minutes in order to :

In the experiment to show that light is necessary for photosynthesis, the pluked leaf is boiled in ethanol and then washed with water. After this, it is tested for the presence of a carbohydrate by a chemical which is:

In an experiment to test the presence of starch in a leaf, the plucked leaf is first boiled in water for a few minutes. This is an important step in the experiment because it:

In an experiment to show that 'sunlight is necessary for photosynthesis', the leaf is boiled in alcohol for a few minutes using a water bath. It is essential because:

The diagram below illustrates iodine test for the presence of starch in a leaf Why is the leaf boiled in water for few minutes ?

The steps necessary for setting up the experiment, 'To demonstrate that light is necessary for photosynthesis' are not given here in proper sequence: I. Keep the potted plant in sunlight for 3 to 4 hours. II. Keep the potted plant in darkness for about 48 hours. III. Cover a leaf of the plant with a strip of black paper. IV. Pluck the leaf and test it for starch. The correct sequence of steps is:

The steps taken for setting up an experiment to demonstrate that 'light is necessary for photosynthesis', were as follows: * A strip of black paper was clipped on the leaf of a potted plant * The plant was kept in the sun for four hours * The strip was removed and the leaf was placed in boiling alcohol in a water bath * The leaf was washed and tested for starch The result was not as expected. Identify the step which had been missed out:

In the experiment to show that light is necessary for photosynthesis, some of the steps of the experiment deal with the following activites: I. Starch reacts with iodine and gives blue-black colour II. Chlorophyll is dissolved in ethanol III.Hot water makes leaf tissue soft ltbgt The correct sequence of these steps is:

Before testing the leaf for starch at the end of the experiment, 'light is necessary for photosynthesis', the experimental leaf should be boiled in: