Quiz2_CHM128 : Solution and colloid

Which of the following is a heterogeneous mixture?

• Corn starch powder

• Brick

• Olive oil

• Blood

What kind of the mixture is the smallest particle size?

• Solutions

• Colloid solutions

• Suspensions

• All mixtures are the same particle size

What kind of the bonding interaction between hydrophilic colloids with water molecules?

• Triple bonds

• Covalent bonds

• Hydrogen bonds

• Metallic bonds

Which of the following is not the optical properties of colloid solution?

• Light scattering

• Tyndall effect

• Elicitation in electron microscope

• Diffusion

Which is the sample showed Tyndall effect in the experiment?

• NaCl solution

• Fe(OH)₃ solution

• Distillate water

• AgNO₃ solution

Which of the following can be functionalized same as semipermeable membrane?

• Ceramic

• Eggshell

• Cellophane bag

• Plastic wrap

Which one is a sample that has separated by a dialysis membrane?

• Filtrate

• Distillate

• Condensate

• Dialysate

In the experiment, what is happened when you dropped AgNO₃ solution into NaCl solution?

• Dark-blue complex of I₃^-

• Bubble of N₂ gas

• White precipitate

• Nothing happened

In the experiment, which of the following reagent is used for testing of starch solution?

• I₂ solution

• AgNO₃ solution

• Benedict’s solution

• KMnO₄ solution

What it will happen when you added the iodine solution into cassava starch solution?

• Yellow solution of I₂

• Dark-blue complex of I₃^-

• White precipitate

• Deep-purple vapor of iodine