Carbon monoxide (CO) and nitrogen gas (N₂) diffuse at nearly the same rate . Which of the following best explains why?

Both gases have similar molar masses (M r ).

Both gases have the same number of protons.

Match the term to the correct description.

separates an insoluble substance from a liquid

a solid appears as the solution cools

the solvent is removed as a gas

used to separate a mixture of two liquids

a gas changes to a liquid, on cooling

Which of the following are properties of ionic compounds such as potassium sulfide, K 2 S?

Conducts electricity when dissolved in water

Potassium is in Group 1 of the periodic table . Which of the following statements about potassium are correct ?

The type of bonding is metallic.

Its structure has potassium ions (K⁺) arranged in a lattice surrounded by free electrons.

There is a strong force of attraction between potassium ions and the free electrons.

Its structure shows sharing of electrons.

Barium sulfate (BaSO₄) is an insoluble salt that can be prepared by precipitation . It is formed by mixing aqueous solutions of barium nitrate and sulfuric acid : Ba(NO 3 ) 2 (aq) + H 2 SO 4 (aq)→BaSO 4 (s) + 2HNO 3 (aq) Arrange the steps involved in preparing the insoluble salt in the correct order.

Mix solutions of barium nitrate and sulfuric acid.

Filter the mixture to separate the precipitate.

Wash the precipitate with distilled water.

Dry the precipitate by pressing it between filter papers.

Graphite, diamond, and silica (silicon dioxide) are all giant covalent substances. Which of the following statements correctly describe their structure and properties?

Diamond has a tetrahedral structure where each carbon atom is bonded to four others.

Graphite conducts electricity because it has free-moving delocalized electrons.

Diamond is very hard due to its strong covalent bonds.

Graphite is soft and slippery because layers can slide over each other.

Silica has a layered structure with weak forces between the layers.

Match each giant covalent substance to its common use.

Used in lubricants and pencil leads

Magnesium reacts with fluorine to form the ionic compound magnesium fluoride. The electronic structures of an atom of magnesium and an atom of fluorine are shown.

Has two electrons in its outer shell

Has seven electrons in its outer shell before bonding

Loses two electrons and forms a positive ion

Gains one electron to achieve a full outer shell

Electrostatic attraction between oppositely charged ions

Match each term with its correct description.

Has a relative mass of 1 and no charge

Found in the nucleus and has a positive charge

Central part of the atom where protons and neutrons are located

Match each type of structure with its correct conductivity behavior in both solid and liquid states.

Conducts electricity only when molten or in solution, not as a solid

Conducts electricity in both solid and liquid states due to mobile electrons

Does not conduct electricity in both solid and liquid states due to lack of free-moving charged particles

End of Semester Exam Revision

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9th Grade

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Practice Problem

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Medium

Evelyn Cabading

Used 3+ times

FREE Resource

43 questions

Show all answers

MATCH QUESTION

2 mins • 1 pt

Match each particle arrangement to its corresponding state of matter.

gas

liquid

solid

MULTIPLE SELECT QUESTION

1 min • 1 pt

Which of the following statements best describe the movement of molecules in the liquid state?

The molecules are not moving from place to place.

The molecules are sliding over each other.

Molecules are fixed in position and only vibrate.

Molecules are in constant random motion.

MATCH QUESTION

5 mins • 1 pt

Match each type of structure to its corresponding diagram.

giant molecular

metallic

simple molecular

giant ionic

DRAG AND DROP QUESTION

3 mins • 1 pt

Complete the following sentences:
Sodium chloride is an (a) compound. It does not conduct electricity when it is a (b) because the ions cannot move. When it is (c) , sodium chloride does conduct electricity because the ions are free to move.

ionic

solid

molten

MATCH QUESTION

5 mins • 1 pt

Match the term to the correct change of state

boiling

melting

sublimation

freezing

condensation

MULTIPLE SELECT QUESTION

3 mins • 1 pt

Which changes of state involve energy being released?

FILL IN THE BLANK QUESTION

3 mins • 1 pt

Which three substances are solids at room temperature?

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End of Semester Exam Revision

43 questions

Match each particle arrangement to its corresponding state of matter.

Which of the following statements best describe the movement of molecules in the liquid state?

Match each type of structure to its corresponding diagram.

Complete the following sentences:
Sodium chloride is an (a) compound. It does not conduct electricity when it is a (b) because the ions cannot move. When it is (c) , sodium chloride does conduct electricity because the ions are free to move.

Match the term to the correct change of state

Which changes of state involve energy being released?

Which three substances are solids at room temperature?

Which one is a gas at room temperature?

Which two substances are liquids at room temperature?

Which one is an impure substance?

Create a free account and access millions of resources

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Discover more resources for Chemistry

End of Semester Exam Revision

43 questions

Match each particle arrangement to its corresponding state of matter.

Which of the following statements best describe the movement of molecules in the liquid state?

Match each type of structure to its corresponding diagram.

Complete the following sentences:Sodium chloride is an (a) compound. It does not conduct electricity when it is a​ (b) because the ions cannot move. When it is ​ (c) , sodium chloride does conduct electricity because the ions are free to move.

Match the term to the correct change of state

Which changes of state involve energy being released?

Which three substances are solids at room temperature?

Which one is a gas at room temperature?

Which two substances are liquids at room temperature?

Which one is an impure substance?

Create a free account and access millions of resources

Similar Resources on Wayground

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Discover more resources for Chemistry

Complete the following sentences:
Sodium chloride is an (a) compound. It does not conduct electricity when it is a (b) because the ions cannot move. When it is (c) , sodium chloride does conduct electricity because the ions are free to move.