STM3305 Chemical Part 1

Which level is responsible for determining the physical behavior of a material?

• Level 1

• Level 2

• Level 3

• Level 4

Which type of material is more likely to interact with food?

• Plastic

• Paper

• Glass

• Metal

What are the major atoms found in plastics?

• C, H

• C, O, N, Cl

• Si, O

• Fe, Al

Which type of bond is responsible for the strength and malleability of metals?

• Ionic bond

• Covalent bond

• Metallic bond

• Van der Waals forces

What determines the polarity of a covalent bond?

• The number of covalent bonds

• The difference in electronegativities

• The type of atoms involved

• The degree of polymerization

Which type of bond is less commonly found in packaging materials?

• Ionic bond

• Covalent bond

• Metallic bond

• Van der Waals forces

What is the main function of the aluminum foil layer in an aseptic carton?

• Strength and stiffness

• Gas and light barrier

• Inner and outer protection

• Heat sealing and binding

Which type of bond is responsible for the gas permeation through package walls?

• Ionic bond

• Covalent bond

• Metallic bond

• Van der Waals forces

What are the commonly found atoms in glass?

• C, H

• C, O, N, Cl

• Si, O

• Fe, Al

What is the main function of paper in packaging materials?

• Strength and stiffness

• Gas and light barrier

• Inner and outer protection

• Heat sealing and binding