Class 10 Science Chapter 6 Activities Solutions

In this post, you will find Class 10 Science Chapter 6 Activities Solutions of NCERT Science book. This Class 10 Science Chapter 6 Activities Solutions will help you to understand the complete procedure, observations, conclusions, and precautions. Activity is based on Chapter 6 Life Processes.

Class 10 Science Chapter 6 Activities Solutions

After reading NCERT solutions of class 10 science chapter 6, you can better understand Class 10 Science Chapter 6 Activities Solutions. Here you will find all NCERT Class 10 Science chapter 6 activities 6.1 solutions with the complete explanation.

 

NCERT Science Class 10 Chapter 6 - Life Processes Activity solution

Activity 6.1Class 10 Science

 

Object: Light is essential for photosynthesis

Materials Required: A distracted potted plant with variegated leaves. (Variegated means leaves with green and non-green areas, like leaves of Croton or money plant). Leaves can be destarched by keeping the plant in a dark room for three days, Petri dish, tripod stand, wire gauze, blotting paper, dropper, spirit lamp or burner, water bath, 70% alcohol, iodine solution, translucent butter paper, soft pencil.

Procedure: We will follow the below steps to perform this activity-

(i) First, we keep the plant in a dark room for three days so that the starch gets used up.

(ii) Now Keep the destarched plant in sunlight for about six hours.

(iii) Pluck a leaf from this plant. It should be a variegated leaf.

(iv) Place translucent butter paper over the leaf.

(v) Mark the green and non-green areas on it. We can make a separate diagram of the leaf showing the pattern of variegation. Colourless areas indicate the absence of chlorophyll.

(iv)  Dip this leaf in boiling water for a few minutes.

(v)   Take the leaf out and now dip it in a beaker containing alcohol.

(vi)  Now place this beaker carefully in a water bath and heat till the alcohol begins to boil (Alcohol is a highly inflammable substance, take care) Alcohol decolourizes the leaf completely. 

(vii) Take out the decolorized leaf dip in water to remove the alcohol.

(viii)        Spread the leaf in a Petri dish and put a few drops of iodine solution. After 2-3 minutes rinse off excess iodine solution, and observe.

Class 10 Science Chapter 6 Activity 6.1Solutions

Observation: This leaf after treatment with iodine shows two types of patches. Some areas are bluish-black while others are yellowish. Bluish black areas show the presence of starch. The yellowish area colourless areas devoid of starch. When these patches are compared with the diagram of the leaf showing variegation pattern, it becomes of the leaf showing variegation pattern, it becomes clear that bluish-green areas are the ones which were previously green. Non-green areas remain colourless or yellowish.

Inference/conclusions: Now it can be inferred that only the chlorophyll-containing areas produce starch. It proves that chlorophyll is necessary for photosynthesis.

Precautions:

(i) Destarch the potted plant properly.

(ii)Make the pattern of variegation on butter paper. It should be compared with the leaf after the iodine test.

(iii)  Alcohol should be heated in a water bath only.

(iv) We must take care when using alcohol.

So now you can understand Class 10 Science Chapter 6 Activities

Solutions, for better  practice  you can also 

Related Topics –

  1. Next Activity- 6.2 Carbon dioxide is essential for photosynthesis

2.   Solution of Chapter 6 Life Processes

3.   MCQof chapter 6 Life Processes

4.   Extra questions of chapter 6 Life Processes