ICSE 2018: A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis.

ICSE 2018

Q. A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. Observe the diagram and answer the questions. [5]

 

(i) What aspect of photosynthesis is being tested in the above diagram? 

(ii) Represent the process of photosynthesis in the form of a balanced equation. 

(iii)Why was the plant kept in the dark before beginning the experiment? 

(iv)What will be the result of the starch test performed on leaf ‘A’ shown in the diagram? Given an example of a plant with variegated leaves. 

(v) Draw a neat labelled diagram of a chloroplast.

Solution:

The diagram given below represents an experiment to prove the importance of a factor in photosynthesis.

ICSE 2019:

(a) The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow. [5 marks]

(i) Name the factor studied in this experiment.

(ii) What will you observe in the experimental leaf after the starch test?

(iii) Explain the process of photosynthesis.

(iv) Give a balanced chemical equation to represent the process of photosynthesis.

(v) Draw a neat, labelled diagram of an experimental set-up to show that oxygen is released during photosynthesis.

Solution: