Which of the following are biodegradable and which non-biodegradable ?
Glass bottle, Paper, Ball point pen refill, Hay, DDT, Wheat, Cake, Wood, Polythene bag, Jute bag, Cotton cloth, Grass, Vegetable peels

Select the biodegradable items from the list given below. Polythene bags, old clothes, wilted flowers, pencil shavings, glass bangles, bronze statue, vegetable peels

In the following groups of materials, which group(s) contains only non-biodegradable items ? (i) Wood, paper, leather, (ii) Polythene, detergent, PVC (iii) Plastic, detergent, grass, (iv) Plastic, bakelite, DDT

Unlimited exploitation of nature by man disturbed the delicate ecological balance between the living and non-living components of the biosphere. The unfavourable conditions created by man himself threatened the survival not only of him but also of the entire living organisms on the mother earth. Rehan is an active member of 'Eco club' of his school which is creating environmental awareness amongst the school students, spreading the same in the society and also working hard for preventing environmental degradation of the surroundings. As part of this awareness programme, they are explaining the importance of using different dustbing for biodegradable and non-biodegradable wastes. Generally green duslbing are for biodegradable wastes and blue for non-biodegradable wastes. In the following groups of materials, which group(s) contains only non-biodegradable items? (I) Wood, paper, leather (II) Polythene, detergent, PVC (III) Plastic, detergent, grass (IV) Plastic, bakelite, DDT

In the following groups of materials, which group/groups contain only non-biodegradable materials ? (i) wood, paper, leather (ii) polythene, detergent, PVC (iii) plastic, detergent, grass (iv) plastic, bakelite, DDT

Once there was a heavy downpour for about three hours in the early morning. Irfan and his family were finding it difficult to carry out their morning chores as the sewer water was flowing back into the toilets, the road outside was flooded with water and they could not move out. On this serious problem, Irfan called a meeting of the residents and said that we are using too much polythene bags and other plastic items which we throw here and there, which finally move into the drains and sewer lines which get choked. As these are non-biodegradable, they remain as such for long time. So we should use bags made up of cloth and jute which are biodegradable. Answer the following questions : (i) Name a polymer which is biodegradable. Write the structure of its monomers and the repeating unit. (ii) Write two uses of this polymer. (iii) Write any two values shown by Irfan.

Once there was heavy downpour for about 3 hours in the early morning. Irfan and his family were finding it difficulat to carry out their daily morning chores as the sewer water was flowing back into the toilits, th road in front of their house was flooded with water and they could not move out. On this very serious problem Irfan called a meeting of all the residents. In the meeting Irfan discussed th problem and said that we as using too much polythene bags and other plastic items which we throw here and other plastic items which we throw here and there. All these move into the drains and sewer lines which get choked and do not allow flow of water. As these are non-biodegradable, they remain as such for a long time. So to overcome this problem, we should use bags made up of cloth or jute which are biodegradable. (i) Answer the following questions : (i) Name a polymer which is biodegradable. Write the sturctures of monomers and the repeating unit. (ii) Write two uses of this polymer. (iii) Write any two values shown by Irfan.