Question 1 :
Terrycot is made by mixing two types of fibres. Write the names of the fibres.
Question 2 :
Indicate whether the following statements are True or False. Most of the plastics are biodegradable.
Question 3 :
Indicate whether the following statements are True or False. The fabric terywool is obtained by mixing terylene and wool.
Question 5 :
Which of the following is not a common property of plastics?
Question 6 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0b7f59b460d7261f344.png' />
From the above image ,Complete the crossword given below with the help of clues.
Across 1: Substance used as synthetic wool
Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0bbf59b460d7261f34a.png' />
From the above image ,Complete the crossword given below with the help of clues.
Down 6: A synthetic fibre classified as polyester
Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0bdf59b460d7261f34c.png' />
From the above image match the items in List 1 with items in List 2
Question 9 :
The synthetic fibres are also known as animal made fibres .
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0b8f59b460d7261f346.png' />
From the above image ,Complete the crossword given below with the help of clues.
Across 3: Substance made up of large number of smaller molecules
Question 12 :
Indicate whether the following statements are True or False. Most of the plastics are biodegradable.
Question 13 :
The most suitable material for the preparation of handles of cooking utensils is
Question 14 :
State True or False. Burning of plastics and synthetic fibres produces lots of poisonous gases causing air pollution.
Question 15 :
State True or False.A polymer is a chain of many small units joined together called monomers
Question 17 :
State True or False. Burning of plastics and synthetic fibres produces lots of poisonous gases causing air pollution.
Question 18 :
A synthetic fiber which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?
Question 19 :
Indicate whether the following statements are True or False. The fabric terywool is obtained by mixing terylene and wool.
Question 20 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0b7f59b460d7261f344.png' />
From the above image ,Complete the crossword given below with the help of clues.
Across 1: Substance used as synthetic wool
