Lesson 2.2 Homework

Lesson 2.2 Homework

8th Grade

33 Qs

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Lesson 2.2 Homework

Lesson 2.2 Homework

Assessment

Quiz

Chemistry

8th Grade

Practice Problem

Easy

Created by

Viktoriia Lazarenko

Used 1+ times

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33 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How would you separate the water from seawater?

Filtration

Distillation

Sedimentation

Decantation

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How would you separate the ethanol from an ethanol+water solution?

Simple distillation

Filtration

Fractional distillation

Evaporation

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What do you understand by the term sublimation?

The process by which a liquid changes directly into a gas

The process by which a solid changes directly into a gas

The process by which a gas changes directly into a solid

The process by which a solid changes directly into a liquid

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What type of substance was chromatography originally designed to separate?

Colorless substances

Ions in a solution

Colored substances

Gases in a mixture

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How can we now extend the use of chromatography to separate colorless substances?

By using heat

  • By using techniques such as UV light, chemical reagents, or staining

By changing the solvent

By increasing the sample size

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Define the term Rf value in connection with chromatography.

The distance traveled by the substance divided by the distance traveled by the solvent

The distance traveled by the substance divided by the distance traveled by the solute

The distance traveled by the solute divided by the distance traveled by the solvent

The distance traveled by the solvent divided by the distance traveled by the substance

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Декантація

Filtration

Centrifugation

Decanting

Crystallisation

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