Question

experiment to show sunlight is essential for photosynthesis... ​

Answer 1

Answer:

To prove the necessity of sunlight in photosynthesis following steps need to do

Take a plant with destarched leaf.

Leaf is partially covered with black paper on which a design is cut.

Expose this plant to sunlight for few hours and perform a starch test with iodine solution.

Observation-

Covered leaf part shows brown colouration.

Exposed leaf shows blue-black colour.

Result- Starch is present in the exposed leaf.

Conclusion- Leaf exposed to sunlight give iodine test, proving that sunlight is necessary for photosynthesis.

Answer 2

Answer:

Take two pot.

Add some soil and plant the plants to the both pots.

Mark one pot as A and another as B.

Now keep pot A in sunlight and pot B in a dark room for 3-4 days and water them daily. Observe

What do you observe?

You observe the pot A plant grows well. Where the pot B doesn't grow well. Hence, the plants need sunlight to carry-on the process of photosynthesis.