SCI111 polymer 2

The cross link agent used in our LAB is…….

• Borax

• NaOH

• Polyvinyl chloride

• HCl

Which of the following is formula for borate ion?

• B(OH)3

• B(OH)4-

• H3BO3

• B2O32-

What was observed after cross link bonds of slime was rebonded?

• Volume of slime was decreased

• Slime became viscosity

• Slime turned colourless again

• Heat released

Which of the following reagent use for rebounding in this LAB?

• B2O32-

• Heat

• NaOH

• HCl

The reaction can undergoes toward the condensation reaction which yield?

(A) Covalent bond between Borax and PVA

(B) water is the product

(C) Flexibility of the slime

Which statement is correct?

• Both A and B

• Both B and C

• Both A and C

• All A, B and C

Which of the following is the name of the formula? Na2[B4O5(OH)4]·8H2O

• PVA

• Sodium

• Borax

• polyethanol

Which of the following is natural polymer?

• polystyrene

• strarch

• polyethene

• perspex

Which of the following is NOT the chemical that we use in the laboratory?

• PVA

• Borax

• NaOH

• NaHCO3

At which point that we can observed cross link is break in the reaction?

• heat release

• colour change

• increasing volume

• Slime became viscous

Which of the following is the Advantage of Slime?

• Shampoo

• soap

• cleaning

• lotion