Chemisty ASB 2021

Which colloid has a liquid dispersing medium and a liquid dispersed phase?

(8)

• Solid sol

• Foam

• Sol

• Emulsion

Which colloid has a gas dispersing medium and a solid dispersed phase?

(9)

• Solid aerosol

• Aerosol

• Solid foam

• Foam

What kind of material allows the flow of charge when applied with a voltage?

(10)

• Insulator

• Semiconductor

• Conductor

• Semi-insulator

Which material is modified by doping?

(11)

• Insulator

• Semiconductor

• Conductor

• All of the answers are correct

What term means ‘solvent attracting’?

(47)

• Lyophobic

• Association colloid

• Lyophilic

• Hydrocolloid

What kind of mixture has particles that are between 1 and 1000 nanometers in diameter?

(48)

• Suspension

• Solution

• Colloid

• All answer options are correct.

What kind of mixture do you have if you see particles settling to the bottom of the container?

(49)

• Colloid

• Solution

• Suspension

• Both Colloid and Suspension

Who worked at Xerox, focusing on organic conductors?

(50)

• Rachel Carson

• Esther Conwell

• Bettye Washington Greene

• Maria Goeppert Mayer

What are most conductors made of?

(51)

• Metal

• Rubber

• Glass

• Plastic

Which of the following has a positive coefficient of resistivity?

(52)

• Semiconductor

• Insulator

• Conductor

• Semiconductor and Insulator