Differentiate biodegradable and non-biodegradable pollutants.classify the following under the above two categories:DDT,Paper,Cotton cloth,Plastics.

Name two non-biodegradable pollutants.

Give names of two non biodegradable pollutants.

Which of the following is non-biodegradable pollutant?

The polymers are finding extensive use in our day today life. Natural polymers are biodegradable but most of the synthetic polymers are non-biodegradable. This is causing a serious environmental problem for the waste disposal. With the increasing use of polymers, the problem of dispersal of waste is also causing alarming curse. Answer the following question : Name two natural polymers and two synthetic polymers which are used as fibres.

After the ban on plastic bags, students of one school decided to make the people aware of the harmful effects of plastic bags on environment and Yamuna River. To make the awareness more impactful, they organized rally by joining hands with other schools and distributed paper bags to vegetable vendors, shop keepers and departmental stores. All students pledged not to use polythene bags in future to save Yamuna River. After reading the above passage, answer the following question : Is polythene a condensation or an addition polymer?

After the ban on plastic bags, students of one school decided to make the people aware of the harmful effects of plastic bags on environment and Yamuna River. To make the awareness more impactful, they organized rally by joining hands with other schools and distributed paper bags to vegetable vendors, shop keepers and departmental stores. All students pledged not to use polythene bags in future to save Yamuna River. After reading the above passage, answer the following question : What values are shown by the students?

After the ban on plastic bags, students of one school decided to make the people aware of the harmful effects of plastic bags on environment and Yamuna River. To make the awareness more impactful, they organized rally by joining hands with other schools and distributed paper bags to vegetable vendors, shop keepers and departmental stores. All students pledged not to use polythene bags in future to save Yamuna River. After reading the above passage, answer the following question : What are biodegradable polymers? Give one example?

A teacher wanted to analyse the performance of two sections of students in a Mathematics test. She grouped the students into the categories obtaining marks between 0 - 35, 35 - 50, 50 - 60, 60 - 75, 75 and above and formed the following table : Prepare a histogram to respresent the above data.

Following are the two statements regarding the origin life (a) The earliest organisms that appeared on the earth were non green and presumably anaerobes. (b) The first autotrophic organisms were the chemoautotrophic that never released oxygen.Of the above Statements which one of the following options is correct?