Question

Show with an experiment that sunlight is necessary for photosynthesis

Answer 1

heyy mate here's your answer with an attachment!!!

For photosynthesis to occur in green plant the factors required are Sunlight, Chlorophyll and Carbon dioxide. Toprove the necessity of these factors there are certain specific experimentshave to be in the laboratory.

hope it helps..!!

Answer 2

Introduction

Photosynthesis is an important physiological activity of green plants. For photosynthesis to occur in green plant the factors required are Sunlight, Chlorophyll and Carbon dioxide. To prove the necessity of these factors there are certain specific experiments have to be in the laboratory. So students must know clearly how a particular experiment will be done for each factor clearly and also must realize why a particular step will be done for the success of the experiment with reasons.

Aim of the experiment:-

To prove Sunlight necessary for green plants to prepare their food.

Requirements:-

A well watered potted green plant, two strips of black papers, small clips, spirit lamp or bun sen burner, test tube, beaker, Petr-dish, water, mentholated spirit or rectified spirit or ethanol, iodine solution.

Experiment for Sunlight is necessary for Photosynthesis

Sunlight is necessary for Photosynthesis experimental setup:- (Courtesy:-dev.elearn.punjab.gov.pk)

Procedure for the experiment

Before starting the experiment to prove Sunlight is necessary for photosynthesis an important step has to be carried out is known as De-starching. De-starching is a process in which the starch present in the leaves will be eliminated by keeping the plant in dark room or closed cup-board for about 48 hours. This step is done to ensure that previously manufactured food in the leaves get consumed when the plant was kept in dark place since photosynthesis doesn't occur at that time.

Next strips of black paper will be arranged one on either side of the selected leaf of the De-starched plant with the help of clips. Now the whole plant is kept in bright Sunlight for about 3-4 hours. Then the strips of black papers are removed from the experimental leaf and then starch test or Iodine test is conducted for the experimental leaf.

.