Chemical Reactions Quiz

1. A chemical reaction takes place when...

• a substance mixes with another substance to form a heterogeneous mixture

• a substance changes from a solid to a liquid

• 1. two or more substances are combined to form a new substance

• 1. two or more substances are mixed together, and the new substance has the same properties as the old substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the compound MgO, which of the following statements are true?

• Magnesium will lose 2 electrons, oxygen will gain 2 electrons.

• Magnesium will lose 2 electrons, oxygen will gain 1 electron.

• Magnesium and oxygen will both lose 2 electrons.

• Magnesium and oxygen will form a covalent compound.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

Balance the following equation.

​ (a)   NaOH + ​ (b)   FeBr3 🡪 ​ (c)   NaBr + ​ (d)   Fe(OH)3

• 3
• 1
• 2

Tags

NGSS.MS-PS1-5

Balance the following equation.

​ ​ (a)   Na₂SO₂ 🡪 ​ ​ (b)   Na + ​ (c)   SO₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is true about an ionic bond?

• Electrons are transferred.

• A cation combines with an anion.

• A metal bonds with a non-metal.

• all of the above

Look at the equation. According to the Law of Conservation of Mass, what would be the mass of Cl?

• 60 g

• 100 g

• 151 g

• 141 g

Tags

NGSS.MS-PS1-5

Which of the following is the appropriate name for this compound: CaCl₂

• calcium dichloride

• 1. calcium chloride

• 1. monocalcium dichloride

• 1. calcium chlorine

Which of the following is the appropriate chemical formula for sodium iodide?

Tags

NGSS.MS-PS1-1

Which of the following is the major difference between an ionic bond and a covalent bond?

• 1. Covalent bonds transfer electrons while ionic bonds share electrons.

• 1. Covalent bonds share electrons while ionic bonds transfer electrons.

• 1. Covalent bonds are chemical bonds while ionic bonds are not.

• 1. Covalent bonds happen in metals; ionic bonds happen in non-metals.

Tags

NGSS.HS-PS1-1

1. Julie wants to observe the chemical reaction that happens between citric acid and sodium bicarbonate. This reaction is very slow so Julie adds the compound NaCl to speed up the reaction. Which of the following acts as the catalyst in this experiment?

• 1. citric acid

• 1. sodium bicarbonate

• 1. sodium chloride

• There was no catalyst in this reaction.