1 4.1 | CELL BIOLOGY | QUESTION PAPER 1 Score Percentage % AQA GCSC CHEMISTRY Time allowed Life Cycle Assessment & Recycling 1
1.2 | Carbohydrates 50 minutes /42 QUESTION PAPER Q6. Polymers are used to make many materials that people need. (a) Plastic bags are used to carry, protect and store food. Plastic bags are made from polymers. (i) Ethene is the small molecule (the monomer) used to make the polymer for this plastic bag. Name the polymer that is made from ethene. ........................................................................................................................... (1) (ii) Use the correct word from the box to complete the sentence about ethene. condensing corroding cracking Ethene is made by breaking down large hydrocarbon molecules into smaller hydrocarbon molecules by a process called ..................................................... (1) (iii) The hydrocarbon ethene has the formula C 2H4 Complete the sentence about ethene. Ethene is a hydrocarbon made up of carbon and .......................................... atoms. (1) (b) The hydrocarbons used to make ethene come from crude oil. The properties of hydrocarbons are linked to the number of carbon atoms in their molecules. Number of carbon atoms 5 6 7 8 9 Boiling point in °C 36 69 99 125 151 (i) Use the data in the table to complete the bar chart. (2) (ii) What happens to the boiling point of a hydrocarbon as the number of carbon atoms increases? ................................................................................ ........................................... (1)
1.2 | Carbohydrates 50 minutes /42 QUESTION PAPER Q6. Polymers are used to make many materials that people need. (a) Plastic bags are used to carry, protect and store food. Plastic bags are made from polymers. (i) Ethene is the small molecule (the monomer) used to make the polymer for this plastic bag. Name the polymer that is made from ethene. ........................................................................................................................... (1) (ii) Use the correct word from the box to complete the sentence about ethene. condensing corroding cracking Ethene is made by breaking down large hydrocarbon molecules into smaller hydrocarbon molecules by a process called ..................................................... (1) (iii) The hydrocarbon ethene has the formula C 2H4 Complete the sentence about ethene. Ethene is a hydrocarbon made up of carbon and .......................................... atoms. (1) (b) The hydrocarbons used to make ethene come from crude oil. The properties of hydrocarbons are linked to the number of carbon atoms in their molecules. Number of carbon atoms 5 6 7 8 9 Boiling point in °C 36 69 99 125 151 (i) Use the data in the table to complete the bar chart. (2) (ii) What happens to the boiling point of a hydrocarbon as the number of carbon atoms increases? ................................................................................ ........................................... (1)
